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Date
Winner
Loser
Tournament
Round
Score
1981-05-08
Ismail El Shafei ()
Nicholas Kalogeropoulos ()
Davis Cup EUR R1: EGY vs GRE
RR
6-1 6-3
1981-05-08
Tarek El Sakka ()
Nicholas Kalogeropoulos ()
Davis Cup EUR R1: EGY vs GRE
RR
6-4 6-3 6-8 6-2
1980-03-10
John Austin ()
Nicholas Kalogeropoulos ()
San Jose
R32
6-4 6-4
1979-09-14
Alex Metreveli ()
Nicholas Kalogeropoulos ()
Davis Cup EUR PR: GRE vs URS
RR
6-3 5-7 6-4 7-5
1979-09-14
Alexander Zverev Sr ()
Nicholas Kalogeropoulos ()
Davis Cup EUR PR: GRE vs URS
RR
6-0 6-3 6-3
1979-03-19
Bruce Kleege ()
Nicholas Kalogeropoulos ()
San Jose
R16
6-4 6-2
1979-03-19
Nicholas Kalogeropoulos ()
Bill Scanlon (75)
San Jose
R32
7-6 6-3
1978-09-15
Lars Elvstrom ()
Nicholas Kalogeropoulos ()
Davis Cup EUR PR: GRE vs DEN
RR
6-3 1-0 RET
1977-09-16
Nicholas Kalogeropoulos ()
Wouter Fok ()
Davis Cup EUR PR: NED vs GRE
RR
6-4 0-6 7-5 3-6 6-3
1977-09-16
Louk Sanders ()
Nicholas Kalogeropoulos ()
Davis Cup EUR PR: NED vs GRE
RR
8-6 6-4 3-6 8-6
1977-04-01
Jose Higueras (50)
Nicholas Kalogeropoulos ()
Davis Cup EUR PR: GRE vs ESP
RR
6-4 6-0 6-2
1977-04-01
Manuel Orantes (6)
Nicholas Kalogeropoulos ()
Davis Cup EUR PR: GRE vs ESP
RR
6-1 6-2 6-0
1976-09-24
Nicholas Kalogeropoulos ()
Carl Edvard Hedelund ()
Davis Cup EUR PR: GRE vs DEN
RR
6-2 6-3 6-4
1976-09-24
Nicholas Kalogeropoulos ()
Tom Christensen ()
Davis Cup EUR PR: GRE vs DEN
RR
6-1 6-3 6-4
1976-04-30
Nikola Pilic ()
Nicholas Kalogeropoulos ()
Davis Cup EUR PR: YUG vs GRE
RR
6-3 6-2 6-2
1976-04-30
Zeljko Franulovic ()
Nicholas Kalogeropoulos ()
Davis Cup EUR PR: YUG vs GRE
RR
6-4 6-0 6-0
1975-09-05
Nicholas Kalogeropoulos ()
Joao Lagos ()
Davis Cup EUR PR: GRE vs POR
RR
6-1 8-6 6-4
1975-09-05
Nicholas Kalogeropoulos ()
Jose Vilela ()
Davis Cup EUR PR: GRE vs POR
RR
6-3 6-2 6-2
1974-09-27
Tom Christensen (285)
Nicholas Kalogeropoulos (238)
Davis Cup EUR PR: DEN vs GRE
RR
6-3 3-6 12-10 4-6 6-3
1974-09-27
Nicholas Kalogeropoulos (238)
Lars Elvstrom ()
Davis Cup EUR PR: DEN vs GRE
RR
7-5 7-5 2-6 9-7
1974-04-19
Bernard Mignot (158)
Nicholas Kalogeropoulos (234)
Davis Cup EUR PR: BEL vs GRE
RR
6-2 7-5 1-6 6-4
1974-04-19
Patrick Hombergen (203)
Nicholas Kalogeropoulos (234)
Davis Cup EUR PR: BEL vs GRE
RR
6-1 6-4 6-3
1974-03-27
Vitas Gerulaitis (135)
Nicholas Kalogeropoulos (234)
Tempe
R32
6-3 2-6 6-4
1974-03-24
Karl Meiler (38)
Nicholas Kalogeropoulos (234)
Jackson
R16
6-4 6-4
1974-03-17
Karl Meiler (38)
Nicholas Kalogeropoulos (234)
Calgary
R16
6-4 6-3
1974-03-17
Nicholas Kalogeropoulos (234)
Chris Burr ()
Calgary
R32
6-7 6-2 6-4
1974-03-10
Zeljko Franulovic (67)
Nicholas Kalogeropoulos (234)
Hampton
R32
6-7 7-6 7-5
1974-03-03
Jurgen Fassbender (41)
Nicholas Kalogeropoulos (234)
Paramus
R16
6-4 6-7 6-3
1974-02-24
Dick Bohrnstedt (149)
Nicholas Kalogeropoulos (113)
Salisbury
R64
2-6 7-5 6-4
1974-02-11
Jimmy Connors (3)
Nicholas Kalogeropoulos (113)
Birmingham
R16
6-4 6-3
1974-02-04
Ian Fletcher (87)
Nicholas Kalogeropoulos (113)
Little Rock
R32
6-1 6-3
1974-01-29
Toma Ovici (182)
Nicholas Kalogeropoulos (113)
Baltimore
R32
7-5 3-6 6-2
1974-01-22
Byron Bertram (152)
Nicholas Kalogeropoulos (113)
Omaha
R16
7-6 6-1
1974-01-17
Jeff Austin (56)
Nicholas Kalogeropoulos (113)
Roanoke
R16
6-4 3-6 6-3
1973-11-25
Ivan Molina (54)
Nicholas Kalogeropoulos (110)
Buenos Aires
R32
6-1 6-3
1973-06-23
Georges Goven ()
Nicholas Kalogeropoulos ()
Eastbourne
R32
6-2 5-7 9-7
1973-06-11
Jim Mcmanus ()
Nicholas Kalogeropoulos ()
Nottingham
R64
6-2 5-7 6-4
1973-06-02
Jan Kodes ()
Nicholas Kalogeropoulos ()
Rome
R64
6-2 6-2
1973-06-02
Nicholas Kalogeropoulos ()
Ian Fletcher ()
Rome
R128
6-4 6-1
1973-05-21
Jean Loup Rouyer ()
Nicholas Kalogeropoulos ()
Roland Garros
R128
7-6 1-6 6-3
1973-05-06
Patrice Dominguez ()
Nicholas Kalogeropoulos ()
Bournemouth
R64
3-6 6-3 7-5
1973-05-04
Nicholas Kalogeropoulos ()
Szabolcz Baranyi ()
Davis Cup EUR R1: GRE vs HUN
RR
6-1 7-5 6-4
1973-05-04
Balazs Taroczy ()
Nicholas Kalogeropoulos ()
Davis Cup EUR R1: GRE vs HUN
RR
6-1 5-7 8-6 8-6
1973-04-13
Nicholas Kalogeropoulos ()
George Berner ()
Davis Cup EUR PR: GRE vs FIN
RR
2-6 8-6 6-4 1-6 6-2
1973-04-13
Nicholas Kalogeropoulos ()
Matti Timonen ()
Davis Cup EUR PR: GRE vs FIN
RR
7-5 12-10 6-2
1973-04-02
Adriano Panatta ()
Nicholas Kalogeropoulos ()
Barcelona
R32
6-2 6-3
1973-04-02
Nicholas Kalogeropoulos ()
Patricio Rodriguez Chi ()
Barcelona
R64
4-6 6-1 6-4
1973-03-26
Patrick Proisy ()
Nicholas Kalogeropoulos ()
Valencia
R32
6-3 2-0 RET
1973-03-26
Nicholas Kalogeropoulos ()
U Unknown ()
Valencia
R64
4-6 7-6 6-1
1973-03-20
Ilie Nastase ()
Nicholas Kalogeropoulos ()
Washington 2
QF
6-2 6-3
1973-03-20
Nicholas Kalogeropoulos ()
Byron Bertram ()
Washington 2
R16
6-3 6-0
1973-03-20
Nicholas Kalogeropoulos ()
Steve Tidball ()
Washington 2
R32
6-1 6-1
1973-03-12
Juan Gisbert ()
Nicholas Kalogeropoulos ()
Charleston
R16
5-7 6-3 6-4
1973-03-03
Brian Gottfried ()
Nicholas Kalogeropoulos ()
Hampton
R32
1-6 6-3 6-3
1973-02-19
Jeff Austin ()
Nicholas Kalogeropoulos ()
Salisbury
R16
7-5 3-6 7-6
1973-02-19
Nicholas Kalogeropoulos ()
John Paish ()
Salisbury
R32
2-6 6-2 6-1
1973-02-19
Nicholas Kalogeropoulos ()
Paul Gerken ()
Salisbury
R64
5-7 6-3 6-3
1973-02-12
Ilie Nastase ()
Nicholas Kalogeropoulos ()
Calgary
QF
7-5 6-2
1973-02-12
Nicholas Kalogeropoulos ()
Ian Fletcher ()
Calgary
R16
7-6 7-5
1973-02-12
Nicholas Kalogeropoulos ()
Peter Burwash ()
Calgary
R32
6-4 6-3
1973-02-07
Mike Estep ()
Nicholas Kalogeropoulos ()
Salt Lake City
R16
7-6 2-6 7-5
1973-02-04
Clark Graebner ()
Nicholas Kalogeropoulos ()
Des Moines
F
7-5 4-6 6-4
1973-02-04
Nicholas Kalogeropoulos ()
Juan Gisbert ()
Des Moines
SF
6-7 6-4 7-5
1973-02-04
Nicholas Kalogeropoulos ()
Jaime Pinto Bravo ()
Des Moines
QF
6-3 6-3
1973-02-04
Nicholas Kalogeropoulos ()
Richard Gonzalez ()
Des Moines
R16
7-6 6-4
1973-01-24
Ion Tiriac ()
Nicholas Kalogeropoulos ()
Omaha
R16
3-6 6-3 6-3
1973-01-17
Sandy Mayer ()
Nicholas Kalogeropoulos ()
Birmingham
R16
6-4 7-5
1973-01-03
Ian Crookenden ()
Nicholas Kalogeropoulos ()
Baltimore
R16
7-5 7-6
1972-10-23
Stan Smith ()
Nicholas Kalogeropoulos ()
Barcelona
R32
W/O
1972-07-22
Jose Edison Mandarino ()
Nicholas Kalogeropoulos ()
Kitzbuhel
QF
6-1 6-2 6-7 6-4
1972-07-22
Nicholas Kalogeropoulos ()
Paolo Bertolucci ()
Kitzbuhel
R16
6-3 5-7 2-6 6-3 6-2
1972-07-22
Nicholas Kalogeropoulos ()
Vladimir Zednik ()
Kitzbuhel
R32
4-6 3-6 7-6 6-1 6-3
1972-06-26
Jimmy Connors ()
Nicholas Kalogeropoulos ()
Wimbledon
R64
6-3 7-5 8-6
1972-06-26
Nicholas Kalogeropoulos ()
Stephen Warboys ()
Wimbledon
R128
6-1 1-6 6-3 6-4
1972-06-23
Patrick Proisy ()
Nicholas Kalogeropoulos ()
Eastbourne
R32
6-4 3-6 9-7
1972-06-05
Mike Estep ()
Nicholas Kalogeropoulos ()
Manchester
R64
8-6 6-2
1972-06-05
Nicholas Kalogeropoulos ()
Jun Kamiwazumi ()
Manchester
R128
7-5 6-8 6-1
1972-05-22
Jurgen Fassbender ()
Nicholas Kalogeropoulos ()
Roland Garros
R128
6-3 3-6 3-6 6-4 6-2
1972-05-13
Bob Hewitt ()
Nicholas Kalogeropoulos ()
Bournemouth
R16
6-4 6-3 6-2
1972-05-13
Nicholas Kalogeropoulos ()
Raymond Moore ()
Bournemouth
R32
6-3 6-4 6-2
1972-05-05
Christian Kuhnke ()
Nicholas Kalogeropoulos ()
Davis Cup EUR R1: GRE vs FRG
RR
3-6 8-6 6-1 6-4
1972-05-05
Harald Elschenbroich ()
Nicholas Kalogeropoulos ()
Davis Cup EUR R1: GRE vs FRG
RR
5-7 6-4 6-4 6-2
1972-04-24
Ilie Nastase ()
Nicholas Kalogeropoulos ()
Rome
R64
6-2 6-4
1971-08-03
Ross Case ()
Nicholas Kalogeropoulos ()
Hilversum
R32
6-2 2-6 12-10
1971-06-21
Nikola Pilic ()
Nicholas Kalogeropoulos ()
Wimbledon
R64
6-2 6-2 3-6 4-6 6-1
1971-06-21
Nicholas Kalogeropoulos ()
Pat Cramer ()
Wimbledon
R128
8-9 8-9 6-3 6-2 9-7
1971-06-14
Jaime Fillol ()
Nicholas Kalogeropoulos ()
Eastbourne
R32
4-6 6-1 10-8
1971-06-14
Nicholas Kalogeropoulos ()
Mark Cox ()
Eastbourne
R64
5-7 6-0 6-1
1971-05-21
Stan Smith ()
Nicholas Kalogeropoulos ()
Roland Garros
R128
6-3 6-2 8-6
1971-04-30
Nicholas Kalogeropoulos ()
Eric Drossart ()
Davis Cup EUR R1: GRE vs BEL
RR
6-2 2-6 6-4 4-6 6-3
1971-04-30
Patrick Hombergen ()
Nicholas Kalogeropoulos ()
Davis Cup EUR R1: GRE vs BEL
RR
3-6 6-4 6-2 3-6 6-6 ABD
1971-04-25
Jean Loup Rouyer ()
Nicholas Kalogeropoulos ()
Catania
R32
6-4 6-4
1971-04-05
Nikola Pilic ()
Nicholas Kalogeropoulos ()
Johannesburg
R16
6-2 6-4 4-6 4-6 6-4
1971-04-05
Nicholas Kalogeropoulos ()
John Alexander ()
Johannesburg
R32
6-7 6-7 6-2 6-1 6-3
1971-04-05
Nicholas Kalogeropoulos ()
Sidney Gordon ()
Johannesburg
R64
7-6 5-7 6-2 7-5
1971-03-29
Jackie Saul ()
Nicholas Kalogeropoulos ()
Durban
R64
6-7 6-0 6-2
1970-08-02
Roger Taylor ()
Nicholas Kalogeropoulos ()
Hilversum
R16
6-8 9-7 6-4
1970-08-02
Nicholas Kalogeropoulos ()
Bob Giltinan ()
Hilversum
R32
6-2 6-3
1970-08-02
Nicholas Kalogeropoulos ()
Christopher Wolff ()
Hilversum
R64
6-1 6-1
1970-06-22
John Newcombe ()
Nicholas Kalogeropoulos ()
Wimbledon
R64
6-1 6-2 6-1
1970-06-22
Nicholas Kalogeropoulos ()
Ray Keldie ()
Wimbledon
R128
4-6 6-2 6-3 6-1
1970-06-15
Bob Hewitt ()
Nicholas Kalogeropoulos ()
Eastbourne
R16
6-4 5-7 6-4
1970-06-15
Nicholas Kalogeropoulos ()
John Clifton ()
Eastbourne
R32
6-8 6-4 6-4
1970-06-08
Clark Graebner ()
Nicholas Kalogeropoulos ()
Beckenham
SF
6-1 6-3
1970-06-08
Nicholas Kalogeropoulos ()
Byron Bertram ()
Beckenham
QF
6-4 6-1
1970-06-08
Nicholas Kalogeropoulos ()
Phil Dent ()
Beckenham
R16
6-2 6-3
1970-06-08
Nicholas Kalogeropoulos ()
Frew Mcmillan ()
Beckenham
R32
6-2 3-6 6-4
1970-06-08
Nicholas Kalogeropoulos ()
Steve Fiske ()
Beckenham
R64
9-11 6-3 6-3
1970-05-22
Ilie Nastase ()
Nicholas Kalogeropoulos ()
Davis Cup EUR QF: ROU vs GRE
RR
6-2 7-5 6-4
1970-05-08
Nicholas Kalogeropoulos ()
Pieter Soeters ()
Davis Cup EUR R1: GRE vs NED
RR
7-5 8-6 6-2
1970-05-08
Nicholas Kalogeropoulos ()
Jan Hordijk ()
Davis Cup EUR R1: GRE vs NED
RR
6-1 6-2 6-4
1970-05-01
Tadeusz Nowicki ()
Nicholas Kalogeropoulos ()
Roland Garros
R128
6-3 6-3 6-4
1970-04-13
Ilie Nastase ()
Nicholas Kalogeropoulos ()
Monte Carlo
R16
6-2 6-1
1970-04-13
Nicholas Kalogeropoulos ()
Geoff Masters ()
Monte Carlo
R32
6-1 6-4
1970-04-13
Nicholas Kalogeropoulos ()
Mark Cox ()
Monte Carlo
R64
7-5 1-6 11-9
1969-11-11
Zeljko Franulovic ()
Nicholas Kalogeropoulos ()
Buenos Aires
R16
6-1 6-2 6-1
1969-11-11
Nicholas Kalogeropoulos ()
U Unknown ()
Buenos Aires
R32
6-3 3-6 6-1 6-3
1969-07-21
Ivan Molina ()
Nicholas Kalogeropoulos ()
Munich
R32
6-1 6-1
1969-06-23
Roy Emerson ()
Nicholas Kalogeropoulos ()
Wimbledon
R32
7-5 6-3 6-2
1969-06-23
Nicholas Kalogeropoulos ()
Vladimir Korotkov ()
Wimbledon
R64
2-6 6-4 6-3 3-6 6-3
1969-06-23
Nicholas Kalogeropoulos ()
Jaime Fillol ()
Wimbledon
R128
6-2 6-2 6-4
1969-06-16
Clark Graebner ()
Nicholas Kalogeropoulos ()
London / Queen's Club
R128
W/O
1969-05-28
Ion Tiriac ()
Nicholas Kalogeropoulos ()
Roland Garros
R128
6-2 7-5 6-0
1969-05-21
Tony Roche ()
Nicholas Kalogeropoulos ()
Rome
R32
6-3 8-6 6-2
1969-05-21
Nicholas Kalogeropoulos ()
Patricio Rodriguez Chi ()
Rome
R64
6-4 6-4
1969-05-09
Thomas Lejus ()
Nicholas Kalogeropoulos ()
Davis Cup EUR R1: GRE vs URS
RR
5-7 3-6 6-4 6-2 4-0 RET
1969-04-02
Pancho Guzman ()
Nicholas Kalogeropoulos ()
Jacksonville
SF
6-4 9-7
1969-04-02
Nicholas Kalogeropoulos ()
Ben Bishop ()
Jacksonville
QF
6-2 6-2
1969-04-02
Nicholas Kalogeropoulos ()
Dave Hill ()
Jacksonville
R16
6-0 6-1
1969-04-02
Nicholas Kalogeropoulos ()
Tommy Lile ()
Jacksonville
R32
6-0 6-1
1969-03-17
Gerald Battrick ()
Nicholas Kalogeropoulos ()
St. Petersburg
R16
5-7 6-1 6-3
1969-03-17
Nicholas Kalogeropoulos ()
John Alexander ()
St. Petersburg
R32
6-3 7-5
1969-02-17
Nicola Spear ()
Nicholas Kalogeropoulos ()
Macon
R16
6-1 6-3
1969-02-17
Nicholas Kalogeropoulos ()
Clark Graebner ()
Macon
R32
6-2 10-12 6-3
1969-02-10
Cliff Richey ()
Nicholas Kalogeropoulos ()
Salisbury
R64
6-4 6-2
1968-08-19
Nicola Pietrangeli ()
Nicholas Kalogeropoulos ()
Ortisei
SF
6-4 6-3
1968-08-19
Nicholas Kalogeropoulos ()
Boro Jovanovic ()
Ortisei
QF
3-6 6-3 6-4
1968-08-12
Nicola Pietrangeli ()
Nicholas Kalogeropoulos ()
Viareggio
QF
7-5 6-3
1968-08-11
Thomaz Koch ()
Nicholas Kalogeropoulos ()
Senigallia
R16
3-6 6-0 6-2
1968-08-01
Francois Jauffret ()
Nicholas Kalogeropoulos ()
Montana Vermala
R16
4-6 6-2 6-3
1968-08-01
Nicholas Kalogeropoulos ()
Sergio Palmieri ()
Montana Vermala
R32
6-2 6-3
1968-07-31
Jan Kodes ()
Nicholas Kalogeropoulos ()
Munich
R32
6-4 6-1
1968-07-31
Nicholas Kalogeropoulos ()
Massimo Di Domenico ()
Munich
R64
6-3 6-2
1968-07-08
Wilhelm Bungert ()
Nicholas Kalogeropoulos ()
Dusseldorf
QF
6-3 2-6 6-1 6-1
1968-07-08
Nicholas Kalogeropoulos ()
Attila Korpas ()
Dusseldorf
R16
2-6 6-1 6-4
1968-07-08
Nicholas Kalogeropoulos ()
Bernd Kube ()
Dusseldorf
R32
6-8 6-2 8-6
1968-06-24
Terry Addison ()
Nicholas Kalogeropoulos ()
Wimbledon
R64
4-6 6-1 3-6 6-4 6-3
1968-06-24
Nicholas Kalogeropoulos ()
Raul Peralta ()
Wimbledon
R128
6-1 6-4 6-3
1968-06-17
Richard Russell ()
Nicholas Kalogeropoulos ()
London
R64
W/O
1968-05-27
Rod Laver ()
Nicholas Kalogeropoulos ()
Roland Garros
R64
6-2 4-6 6-4 6-1
1968-05-27
Nicholas Kalogeropoulos ()
Bob Howe ()
Roland Garros
R128
3-6 6-4 6-4 6-4
1968-05-06
Marty Riessen ()
Nicholas Kalogeropoulos ()
Rome
R64
6-2 6-3 7-9 6-2
1968-05-06
Nicholas Kalogeropoulos ()
Franco Bartoni ()
Rome
R128
5-7 6-3 7-5 6-3
1968-05-03
Alex Metreveli ()
Nicholas Kalogeropoulos ()
Davis Cup EUR R1: URS vs GRE
RR
3-6 6-2 1-6 8-6 6-2
1968-05-03
Nicholas Kalogeropoulos ()
Thomas Lejus ()
Davis Cup EUR R1: URS vs GRE
RR
8-10 6-4 6-4 6-1
1968-04-22
Eduardo Zuleta ()
Nicholas Kalogeropoulos ()
Naples
R32
8-6 8-6
1968-04-22
Nicholas Kalogeropoulos ()
Pietro Marzano ()
Naples
R64
6-0 6-3
1968-04-15
John Alexander ()
Nicholas Kalogeropoulos ()
Palermo
R16
6-3 6-4
1968-04-15
Nicholas Kalogeropoulos ()
Tomas Gonzalez ()
Palermo
R32
1-6 6-2 6-4
1968-04-08
Ion Tiriac ()
Nicholas Kalogeropoulos ()
Catania
SF
6-3 6-3 6-2
1968-04-08
Nicholas Kalogeropoulos ()
Patricio Cornejo ()
Catania
QF
6-4 3-6 6-4
1968-04-08
Nicholas Kalogeropoulos ()
Massimo Di Domenico ()
Catania
R16
7-5 6-4
1968-04-08
Nicholas Kalogeropoulos ()
Piero Toci ()
Catania
R32
3-6 6-0 6-3