Madison Brengle of the USA returns the ball to Petra Kvitova of the Czech Republic at the Porsche Grand Prixtennistournament in Stuttgart, Germany, Thursday, April 23, 2015. (Marijan Murat/dpa via AP)
AP Photo
April 23, 2015

STUTTGART, Germany (AP) Madison Brengle of the United States upset third-seeded Petra Kvitova 6-3, 7-6 (2) in the second round of the Porsche Grand Prix on Thursday.

Fourth-seeded Caroline Wozniacki won 7-6 (5), 6-1 against Lucie Safarova of the Czech Republic to reach the quarterfinals as well.

Brengle served for the match at 5-4 but Kvitova saved three match points to force a tiebreaker. Brengle took a commanding lead and won her first match over a top-10 player with a backhand passing shot.

Also, Caroline Garcia of France, Ekaterina Makarova of Russian, and Sara Errani of Italy advanced.

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HOLE YARDS PAR R1 R2 R3 R4
OUT
HOLE YARDS PAR R1 R2 R3 R4
IN
Eagle (-2)
Birdie (-1)
Bogey (+1)
Double Bogey (+2)