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.
STRASBOURG, France (AP) Top-seeded Ashleigh Barty withdrew from the Internationaux de Strasbourg clay-court tournament on Tuesday because of a right arm injury.
Barty was replaced in the main draw by lucky loser Diana Marcinkevica.
The eighth-ranked Australian said she would not take any risk ahead of the French Open, which starts Sunday in Paris.
“I gave it my best chance, but unfortunately I wouldn’t be playing my best tennis,” Barty said. “I’m busy the next two months and I need to look after my body now.”
GENEVA (AP) Former top-10 player Janko Tipsarevic used his wild-card entry to beat Peter Gojowczyk of Germany 7-5, 7-5 in the Geneva Open first round on Monday.
Now ranked No. 317, the 34-year-old Tipsarevic is back in ATP Tour main draws after missing the 2018 season for hamstring injuries to heal.
Fifth-seeded Radu Albot advanced to the second round on a day when two seeded players lost in the final week of clay-court warmups for the French Open.
Albot beat qualifier Lorenzo Sonego 7-6 (6), 7-6 (3), after 92nd-ranked Hugo Dellien beat eighth-seeded Andreas Seppi 6-1, 3-6, 6-4, and seventh-seeded Matthew Ebden lost to Nicolas Jarry of Chile 6-2, 7-6 (4).
Rain cut short play and gave former No. 3 Grigor Dimitrov a day off after playing through two qualifying rounds.
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