LOS CABOS, Mexico — Juan Martin del Potro opened his summer hard-court season with a 7-5, 6-3 victory over American Marcos Giron on Wednesday night in the Mifel Open.
Playing for the first time since losing to Rafael Nadal in the Wimbledon quarterfinals, the top-seeded del Potro set up a quarterfinal match against Egor Gerasimov.
Del Potro won hard-court titles this year at Indian Wells and Acapulco. The fourth-ranked Argentine star has 22 career victories, the biggest on a hard court in the 2009 U.S. Open.
Gerasimov, from Belarus, outlasted fifth-seeded defending champion Sam Querrey of the United States 7-5, 5-7, 7-6 (6). Querrey swept the Los Cabos and Acapulco events last year.
Fourth-seeded Adrian Mannarino of France topped Sweden’s Elias Ymer 6-0, 6-2. The Frenchman will play Cameron Norrie, the British left-hander coming off a semifinal appearance in Atlanta. Norrie beat eighth-seded Feliciano Lopez of Spain 6-3, 6-3.
Japan’s Yoshihito Nishioka also knocked off a seeded player, topping seventh-seeded Taylor Fritz of the United States 7-6 (3), 6-1. Nishioka will face second-seeded Fabio Fognini of Italy.
Third-seeded Damir Dzumhur of Bosnia and Herzegovina got past Italy’s Thomas Fabbiano, 7-6 (0), 7-6 (5). He’ll play American Michael Mmoh, a 7-6 (1), 7-6 (2) winner over Canada’s Peter Polansky.
PRAGUE — Two-time Wimbledon champion Petra Kvitova says she will decide later this week if she’s ready to play at the All England Club.
The 29-year-old Czech player injured her left forearm during training in Paris ahead of the French Open and has not played since. The injury prevented her from defending her title at the Birmingham Classic this week.
Kvitova wrote on Twitter that she was “Happy to tell you that my arm is improving and I just hit some balls on the beautiful grass for the first time.
The sixth-ranked Kvitova, who won the Wimbledon title in 2011 and 2014, reached the Australian Open final and won tournaments in Sydney and Stuttgart this year.
LONDON — American tennis player Anna Tatishvili has appealed her fine of about $50,000 for what the Grand Slam Board ruled was a violation of its first-round performance rule at the French Open last month.
Tatishvili was docked a first-round loser’s full prize money after losing to 29th-seeded Maria Sakkari of Greece 6-0, 6-1 in Paris.
It was Tatishvili’s first competition since October 2017 because of an ankle injury. She has been ranked as high as 50th and is currently outside the top 700 because of her long absence from the tour, but used a special ranking to make the field at Roland Garros.
The Grand Slam Board introduced the performance rule before the 2018 season. The aim is to deter players who enter tournaments while injured from retiring during first-round matches to collect prize money. Players can be fined their first-round check if they do not “perform to a professional standard.”
Injured players who withdraw before the tournament – allowing someone who lost in qualifying to get into the draw – receive half the first-round prize money.