STUTTGART, Germany — Top-ranked Naomi Osaka withdrew from the Porsche Grand Prix semifinals because of an abdominal injury on Saturday.
Osaka said she began to feel the injury before her quarterfinal on Friday, when she came back from 5-1 down in the third set to beat Donna Vekic of Croatia.
“I wanted to wait to see if I could play. I woke up today and I had to roll out of bed, then I decided I wasn’t able to play,” Osaka said.
Her opponent, No. 8-seeded Anett Kontaveit, received a walkover into her fifth WTA final. Kontaveit also advanced to the quarterfinals when Victoria Azarenka retired hurt in their third set.
Osaka didn’t believe her abdominal strain would slow her down too long, as she said she’s endured many of them.
Kontaveit will play Petra Kvitova in the final, after the Czech beat Kiki Bertens of the Netherlands 7-6 (3), 3-6, 6-1 in two hours.
The third-ranked Kvitova has reached her fourth final of the year, and aims for her second title, after winning Sydney in January.
DALLAS – Marcos Giron advanced to the second round of the Dallas Open with a 6-4, 6-7 (1), 6-1 victory over Alex Rybakov on Tuesday.
The seventh-seeded Giron, who reached the semifinals of the inaugural event a year ago, responded quickly after failing to close out the second set, winning the first five games of the deciding set.
Rybakov broke his fellow American when Giron was serving for the match in the second set. Then Rybakov won the first six points of the second-set tiebreaker.
“I’m really happy with how I was able to reset in the third and just get back to the game plan from the beginning and elevate,” Giron said. “He played well and served well and kind of hung in there.”
Eighth-seeded Adrian Mannarino of France won the final five points of a first-set tiebreaker and the last four games of the second to beat American Steve Johnson 7-6 (6), 6-2.
J.J. Wolf, the No. 6 seed, had little trouble in a 6-3, 6-3 victory over fellow American Brandon Holt.
John Isner, the fifth seed and unofficial tournament host in his hometown event, played later Tuesday. Like Giron, Isner lost in the semifinals last year.
DALLAS – Wild-card entry Jack Sock opened with a 7-6 (2), 4-6, 6-4 victory over Ilya Ivashka at the Dallas Open, setting up a second-round meeting with top-seeded fellow American Taylor Fritz.
Sock broke Ivashka’s serve in the final game to win the match. Ivashka fell behind 2-0 to start the final set but broke Sock to get back on serve.
Down a break early in the second set, Ivashka rallied to force the deciding set after Sock cruised in the first-set tiebreaker.
The eighth-ranked Fritz is back for the second Dallas Open after losing in the semifinals as the top seed in the inaugural edition of the indoor hard-court event last year. Defending champion Reilly Opelka isn’t in the field.