Reuters Sports News Summary

Following is a summary of current sports news briefs.

Seahawks quarterback Wilson joins Sounders ownership group

Seattle Seahawks quarterback Russell Wilson and his Grammy Award winning wife Ciara have become part owners of MLS's Seattle Sounders, they said on Tuesday, adding their names to the star-studded ownership group. "We are fired up about the Seattle Sounders because it's our home. It's the place we get to raise our kids and the place we are forever connected to," the couple said in a joint statement.

Kerber knocked out by Estonian Kontaveit in Cincinnati

Estonian Anett Kontaveit ousted German 13th seed Angelique Kerber 7-6(7) 6-2 in the opening round of the Cincinnati Masters on Tuesday. The 23-year-old Kontaveit came from 5-3 down and saved a set point at 6-5 on the way to taking the opening set against the former world number one.

NFL notebook: Brown back in Raiders' camp

Oakland Raiders wideout Antonio Brown returned to training camp Tuesday in Napa, Calif., one day after losing his helmet grievance with the NFL. Brown had not been with the team since he left practice early on July 30. The 31-year-old veteran had sought permission to wear his old helmet, which is no longer certified.

Del Potro withdraws from U.S. Open as knee rehab continues

Juan Martin del Potro will not compete at this year's U.S. Open as the 2009 champion continues to recover from a knee injury, tournament organizers said on Tuesday. The Argentine re-fractured his kneecap during the Queen's Club Championships in June in the latest setback to his injury- plagued career.

MLB notebook: Phils hire Manuel as hitting coach

The Philadelphia Phillies replaced hitting coach John Mallee with 75-year-old former manager Charlie Manuel on Tuesday. The team began the day ranked 24th in the majors in batting average (.245), 23rd in home runs (149) and 22nd in slugging percentage (.738).

Woods ready to play in BMW Championship

Tiger Woods says he is ready to play golf again this week after the former world number one withdrew from last week's Northern Trust due to back pain. Woods arrived on Tuesday at Medinah, Illinois, venue for this week's BMW Championship, and said he would play in the second event of the FedEx Cup playoffs.

Wawrinka sees off determined Dimitrov in Cincinnati

Swiss Stan Wawrinka overcame battling Bulgarian Grigor Dimitrov 5-7 6-4 7-6(4) in a roller-coaster first-round match at the Cincinnati Masters on Tuesday. Dimitrov clawed back from a double break down in the decider to level at 5-5 and after Wawrinka broke again, Dimitrov forced the tiebreak.

Serena withdraws from Cincinnati Masters with back problems

Serena Williams withdrew from the Cincinnati Masters on Tuesday due to back problems just days after spasms forced her to retire from the Rogers Cup final in Toronto. "I came to Mason on Sunday and have tried everything to be ready to play tonight, and was still hopeful after my practice this morning," the 23-times Grand Slam champion said.

U.S. soccer team sign 14-year old on professional contract

Orange County Soccer Club have signed 14-year old Francis Jacobs, making him the youngest professional male signing in United States soccer history, the California club said on Tuesday. Jacobs, who is 14 years, four months and 29 days old, signed a deal with the second tier United Soccer League club and could make his debut on Saturday against Las Vegas Lights FC.

Giants owner hopes rookie QB Jones won't have to play

New York Giants owner John Mara is rooting for Eli Manning. Asked by SNY what he thought an ideal 2019 season would look like, Mara said the 38-year-old Manning is the Giants' present and rookie first-rounder Daniel Jones is the franchise's future.