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Date
Winner
Loser
Tournament
Round
Score
1983-10-10
Shahar Perkiss ()
Harald Theissen ()
Tel Aviv
R16
6-3 6-2
1983-10-10
Harald Theissen ()
Mike Myburg ()
Tel Aviv
R32
6-3 6-2
1983-05-09
Anders Jarryd (77)
Harald Theissen ()
Hamburg
R64
6-0 6-2
1982-12-13
Jeff Borowiak (91)
Harald Theissen ()
Sydney Outdoor
R32
6-2 6-3
1982-12-13
Harald Theissen ()
Sashi Menon ()
Sydney Outdoor
R64
6-2 7-6
1982-12-02
Mike Bauer ()
Harald Theissen ()
Australian Open
R64
2-6 6-3 6-4 6-4
1982-12-02
Harald Theissen ()
Lloyd Bourne ()
Australian Open
R128
7-5 6-4 1-6 3-6 6-3
1982-11-15
Marty Davis ()
Harald Theissen ()
Bangkok
R16
DEF
1982-11-15
Harald Theissen ()
Tom Cain ()
Bangkok
R32
4-6 6-2 6-4
1982-10-25
Pavel Slozil (61)
Harald Theissen ()
Cologne
R32
6-2 6-2
1982-07-19
Jeff Borowiak (63)
Harald Theissen ()
Kitzbuhel
R32
6-1 7-6
1982-07-12
Jonathan Smith ()
Harald Theissen ()
Bastad
R32
6-1 6-4
1982-05-10
Phil Dent (51)
Harald Theissen ()
Hamburg
R64
6-4 6-2
1982-03-29
Mark Edmondson (20)
Harald Theissen ()
Frankfurt
R32
6-7 6-4 6-4
1982-03-08
Mats Wilander (57)
Harald Theissen ()
Brussels
R16
6-3 6-3
1982-03-08
Harald Theissen ()
Nick Saviano (70)
Brussels
R32
7-5 6-4
1981-10-05
Vincent Van Patten (99)
Harald Theissen ()
Tel Aviv
R16
6-2 6-4
1981-10-05
Harald Theissen ()
Bobby Webb ()
Tel Aviv
R32
6-2 6-3
1981-01-19
Carlos Kirmayr (61)
Harald Theissen ()
Guaruja
R16
6-2 6-1
1981-01-19
Harald Theissen ()
Jairo Velasco ()
Guaruja
R32
6-4 2-6 6-4