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Date
Winner
Loser
Tournament
Round
Score
2018-02-10
Rebecca Peterson (137)
Maria Joao Koehler (747)
Fed Cup G1 REL: POR vs SWE
RR
6-4 6-0
2018-02-07
Johanna Konta (11)
Maria Joao Koehler (747)
Fed Cup G1 RR: GBR vs POR
RR
6-1 6-0
2016-02-06
Silvia Njiric (431)
Maria Joao Koehler (912)
Fed Cup G1 PM: POR vs CRO
RR
6-4 6-3
2016-02-04
Maria Joao Koehler (912)
Susanne Celik (325)
Fed Cup G1 RR: SWE vs POR
RR
6-3 6-4
2016-02-03
Kateryna Bondarenko (73)
Maria Joao Koehler (912)
Fed Cup G1 RR: UKR vs POR
RR
6-4 6-2
2015-02-07
Maria Joao Koehler (689)
Kathinka Von Deichmann (334)
Fed Cup G1 PO: LIE vs POR
RR
6-3 6-0
2014-04-28
Ons Jabeur (139)
Maria Joao Koehler (213)
Oeiras
R32
6-3 6-1
2014-02-06
Aliaksandra Sasnovich (151)
Maria Joao Koehler (204)
Fed Cup G1 RR: BLR vs POR
RR
6-3 6-4
2014-02-04
Maria Joao Koehler (204)
Isabella Shinikova (365)
Fed Cup G1 RR: BUL vs POR
RR
3-6 6-1 6-4
2013-08-26
Alize Cornet (28)
Maria Joao Koehler (125)
US Open
R128
6-3 6-2
2013-07-15
Alexandra Cadantu Ignatik (70)
Maria Joao Koehler (117)
Bad Gastein
R32
6-2 6-4
2013-07-08
Kristina Mladenovic (39)
Maria Joao Koehler (118)
Palermo
R32
6-1 7-6(5)
2013-06-24
Victoria Azarenka (2)
Maria Joao Koehler (106)
Wimbledon
R128
6-1 6-2
2013-06-10
Vesna Dolonc (98)
Maria Joao Koehler (109)
Birmingham
R64
6-7(8) 6-0 6-3
2013-05-27
Alize Cornet (27)
Maria Joao Koehler (105)
Roland Garros
R128
7-5 6-2
2013-04-29
Elena Vesnina (28)
Maria Joao Koehler (104)
Oeiras
R32
6-4 6-1
2013-02-25
Estrella Cabeza Candela (108)
Maria Joao Koehler (102)
Acapulco
R32
6-2 6-0
2013-02-18
Alexandra Cadantu Ignatik (96)
Maria Joao Koehler (106)
Bogota
R32
6-0 6-3
2013-01-14
Jelena Jankovic (21)
Maria Joao Koehler (129)
Australian Open
R64
2-6 7-6(5) 6-2
2013-01-14
Maria Joao Koehler (129)
Karin Knapp (124)
Australian Open
R128
3-6 6-3 6-3
2012-04-30
Roberta Vinci (23)
Maria Joao Koehler (227)
Estoril
R16
6-2 6-0
2012-04-30
Maria Joao Koehler (227)
Ayumi Morita (77)
Estoril
R32
6-1 7-5
2012-02-04
Maria Joao Koehler (194)
Isabella Shinikova (341)
Fed Cup G1 PO: BUL vs POR
RR
6-3 7-5
2012-02-03
Maria Joao Koehler (194)
Bibiane Schoofs (154)
Fed Cup G1 RRC: NED vs POR
RR
7-5 4-6 6-2
2012-02-02
Julia Glushko (211)
Maria Joao Koehler (194)
Fed Cup G1 RRC: ISR vs POR
RR
6-2 6-4
2012-02-01
Anne Keothavong (88)
Maria Joao Koehler (194)
Fed Cup G1 RRC: GBR vs POR
RR
6-3 6-4
2012-01-16
Kim Clijsters (14)
Maria Joao Koehler (223)
Australian Open
R128
7-5 6-1
2011-05-07
Maria Joao Koehler (245)
Tatia Mikadze (304)
Fed Cup G2 PO: POR vs GEO
RR
6-2 6-2
2011-05-06
Piia Suomalainen (456)
Maria Joao Koehler (245)
Fed Cup G2 RRA: FIN vs POR
RR
6-2 5-7 7-5
2011-05-05
Nadia Lalami (327)
Maria Joao Koehler (245)
Fed Cup G2 RRA: MAR vs POR
RR
2-6 7-5 6-3
2011-04-25
Greta Arn (48)
Maria Joao Koehler (244)
Estoril
R32
6-2 3-6 6-3
2010-05-03
Arantxa Rus (120)
Maria Joao Koehler (482)
Estoril
R32
6-3 3-6 7-5
2010-02-05
Simona Halep (187)
Maria Joao Koehler (509)
Fed Cup G1 RRB: POR vs ROU
RR
6-4 6-1
2009-05-04
Kristina Barrois (77)
Maria Joao Koehler (630)
Estoril
R32
7-6(4) 6-0