Reuters Sports News Summary

Following is a summary of current sports news briefs.

Petkovic stuns Kvitova at U.S. Open

Andrea Petkovic upset sixth seed Petra Kvitova 6-4 6-4 at the U.S. Open on Thursday to set up a third-round clash with Elise Mertens. World number 88 Petkovic was the better player in the biggest points, breaking the twice Grand Slam champion three times and committing 15 fewer unforced errors on a sun-soaked Louis Armstrong Stadium court.

Halep suffers another early U.S. Open exit

Wimbledon champion Simona Halep's U.S. Open frustrations continued as the Romanian fourth seed suffered a 2-6 6-3 7-6(4) loss to American qualifier Taylor Townsend in second round action on Thursday. Halep, who fell in the first round here in the last two years, managed to fight off a pair of match points in the 10th game of the decider but Townsend's aggressive play at the net carried her home.

Sharing is caring: Federer wants better prize money distribution

Roger Federer is prepared to champion the cause of lower-ranked players on the ATP Tour and said at the U.S. Open on Wednesday that he would fight to ensure a bigger share of the prize pot for them in future. Speaking after a 3-6 6-2 6-3 6-4 win over Bosnian Damir Dzumhur, Federer said the prize money for players at the top of the sport had improved significantly since he began playing but that was not the case at the other end of the spectrum.

Suarez Navarro fined $40,000 after retiring in U.S. Open first round

The U.S. Open fined Carla Suarez Navarro $40,000 on Thursday for violating the First Round Performance Rule. The 30-year-old Spaniard retired after losing the first set of her first-round match against qualifier Timea Babos 6-2, citing back issues.

Medvedev overcomes cramps to reach U.S. Open third round

Daniil Medvedev fought off cramps under the piercing sun to beat Hugo Dellien 6-3 7-5 5-7 6-3 and clinch a third-round berth at the U.S. Open on Thursday, continuing his hot run of form over the last month. The 23-year-old fired down 17 aces and 55 winners, dominating the shorter rallies, but struggled late in the third set, handing Dellien a break and 6-5 lead with a double fault.

Nets forward Chandler receives 25-game PED suspension

The NBA suspended Brooklyn Nets forward Wilson Chandler for 25 games for violating the league's anti-drug program. The league said Thursday that Chandler tested positive for Ipamorelin, a growth hormone-releasing peptide.

Ko's blemish-free streak ends at 114 holes

Ko Jin-young's stretch of consecutive holes without dropping a shot ended after 114 holes when she had a bogey during the opening round at the Portland Classic in Oregon on Thursday. Ko's mind-boggling run finished in surprising fashion when she missed a three-foot par at the ninth hole at Columbia Edgewater Country Club in Oregon.

A's 3B Chapman out of lineup after beaning

Oakland Athletics third baseman Matt Chapman was not in the lineup in Kansas City on Thursday afternoon after being hit in the helmet by a pitch during Wednesday's loss to the Royals. A's manager Bob Melvin told reporters after the game that Chapman will avoid the concussion protocol. On Thursday, Melvin said Chapman woke up with a mild headache.

Nadal gets walkover into U.S. Open third round

Three-times champion Rafa Nadal got a walkover into the third round of the U.S. Open after Australian wildcard Thanasi Kokkinakis withdrew from their evening match on Thursday. Kokkinakis, whose clash with the Spanish second seed was scheduled to close out the Thursday night session at Arthur Ashe Stadium, withdrew with a right shoulder injury, tournament organizers said in a statement.

Osaka stays calm to see off Linette

Naomi Osaka continued her bid for a second straight U.S. Open title with a business-like 6-3 6-4 win over Magda Linette on Thursday to book her place in the third round. After struggling with nerves in her gruelling first-round match, Osaka was calm and collected on Louis Armstrong Stadium court, smacking 13 winners and playing stout defence to dispatch Poland's Linette.