Roger Federer advances at Wimbledon as Mannarino retires

Roger Federer has survived a tough test at Wimbledon with an asterisk.

Adrian Mannarino, playing on his 33rd birthday, won the second and third sets before retiring with a leg injury.

The Frenchman was behind in the fourth set when he slipped on the grass and fell, grabbing his right knee in pain. He limped through two more games in the first-round match before reluctantly calling it quits. The score: 6-4, 6-7 (3), 36, 6-2.

Federer was sheepish about winning.

"Not like this, please," he told the crowd. "Look, he could have won the match at the end. Obviously he was the better player."

An erratic forehand plagued Federer and he flirted with losing in the opening round at a Grand Slam for the first time since 2003. He committed four unforced errors with his forehand in the tiebreaker alone, including a shank.

Even so, the eight-time Wimbledon champion improved to 7-0 against Mannarino.

No. 1-ranked Ash Barty overcame a wobbly stretch to reach the second round at Wimbledon.

Playing on grass for the first time in two years, Barty defeated Carla Suárez Navarro 61, 6-7 (1), 6-1.

Barty let the second set get away when she was two points from victory but regained command by winning the first 13 points and five games of the third set. The Australian hit 13 aces and converted all five of her break-point chances.

Suárez Navarro was appearing in only her second tournament since announcing her recovery from Hodgkin lymphoma.

Alexander Zverev had 20 aces and only 18 unforced errors as he swept qualifier Tallon Griekspoor in the first round at Wimbledon, 6-3, 6-4, 6-1.

The result was a big improvement for Zverev after losing to a qualifier at Wimbledon in 2018 and 2019.

Zverev is seeded fourth but is only 9-5 at the All England Club.

Rain interrupted play for the second day in a row but matches continued on the two courts with retractable roofs.

Sebastian Korda is looking good on grass, just like his sister.

The 20-year-old American made his Wimbledon debut and upset No. 15-seeded Alex de Minaur 6-3, 6-4, 6-7 (5), 7-6 (5).

Korda's sister, golfer Nelly Korda, won her first major title last week and is the first American in seven years to reach No. 1 in the women's world rankings.

Sebastian Korda is ranked a career-high 50th, and added momentum to his breakout year by beating a top 20 player at a Grand Slam for the first time.

De Minaur, a 22-year-old Australian, was coming off his first tour-level grass title at Eastbourne.

Venus Williams has won a match at Wimbledon for the 90th time. She also beat the rain.

The 41-year-old Williams advanced to the second round by defeating Mihaela Buzărnescu 7-5, 4-6, 6-3. The match ended moments before a light shower forced an interruption in play on some courts at the All England Club.

Williams is playing at Wimbledon for the 23rd time. She has won the grass-court tournament five times, most recently in 2008. She is now ranked 111th, and the victory was her first since she won one match at the Australian Open.

Williams saved five break points in the first set as she pulled ahead. When she closed out the victory, she shouted "Come on!" and celebrated with her familiar pirouette.

Williams overcame eight double-faults and erased 13 of the 15 break points she faced.

Eighteen singles matches at Wimbledon have been postponed because of rain, including one between No. 5-seeded Bianca Andreescu and Alize Cornet.

The match involving No. 12 Victoria Azarenka and Kateryna Kozlova was also pushed back to Wednesday, as were 10 other women's matches and six on the men's side.

The tournament had 21 matches postponed Monday.