Serena Williams needed just 51 minutes to clinch the 300th Grand Slam win of her career on Sunday as the defending champion made the Wimbledon last 16.

The 34-year-old American brushed aside Germany's world number 43 Annika Beck 6-3, 6-0 on the back of 25 winners and seven aces and goes on to face long-time Russian rival Svetlana Kuznetsova.

"I thought it was good. I still want to get out to a little bit of a faster start but I was really focused and calm," said Williams, who is just six wins short of Martina Navratilova's Open era record of 306 Slam wins.

Williams has now won 82 matches at Wimbledon as she remains on course to equal Steffi Graf's Open era record of 22 Grand Slam titles with her seventh Wimbledon crown.

Williams has now won 82 matches at Wimbledon as she remains on course to equal Steffi Graf's Open era record of 22 Grand Slam titles with her seventh Wimbledon crown.

300! Source: PTI / AP

Williams took the starring role as play was held on the middle Sunday for only the fourth time in Wimbledon history, and the first time since 2004, as organisers tried to clear the backlog caused by days of rain.

INDIA AT WIMBLEDON

It was a mixed day for Indians as top seeds Sania Mirza and Martina Hingis breezed into the women's third round with a 6-3 6-1 win over the Japanese pairing of Eri Hozumi and Miyu Kato but Leander Paes was ousted in the men's doubles.

The Indo-Swiss pair, who are defending champions, were clinical in their approach and wrapped up the second round clash in 52 minutes on Court No. 3.

The fancied duo served well besides converting five of the eight break points they earned in the match. Sania and Martina's third round opponents will be Christina McHale and Jelena Ostapenko.

Earlier, the 10th seeded Finnish-Australian pair of John Peers and Henri Kontinen needed only 62 minutes to dispatch India's Leander Paes and his Polish partner Marcin Matkowski 6-3 6-2 in the second round.

Paes and Matkowski had three break chances in the opening set but converted none. They lost their serve thrice in the match.

Paes is, though, defending his mixed doubles title with Hingis. They have been seeded 16th and got a first round bye.

Sania and Bopanna have also got first round byes with their respective partners. Sania has paired with Ivan Dodig while Bopanna is playing with Anastasia Rodionova.

ANOTHER ISNER MARATHON

Fans who managed to secure tickets for Sunday's extra day of play got their money's worth on Court Two, where Jo-Wilfried Tsonga downed US marathon man John Isner 6-7 (3/7), 3-6, 7-6 (7/5), 6-2, 19-17.

French 12th seed Tsonga, a semi-finalist in 2011 and 2012, saved a match point in the 32nd game of the final set.

The last set alone lasted more than two hours.

Isner, the 18th seed, famously won the longest tennis match ever played when he beat another Frenchman, Nicolas Mahut, 70-68 in the final set at Wimbledon in the first round in 2010.

That five-setter, stretched over three days, lasted 11 hours and five minutes.

Tsonga goes on to face fellow Frenchman Richard Gasquet for a spot in the quarter-finals.

Nick Kyrgios, the Australian 15th seed, booked a last-16 clash with world number two Andy Murray after beating Feliciano Lopez 6-3, 6-7 (2/7), 6-3, 6-4 in another tie held over from Saturday at one set all.

Murray, the 2013 champion, is the top seed left in the draw after world number one Novak Djokovic was knocked out by Sam Querrey on Saturday.

"I definitely have the tools to beat Andy, but saying that, he's probably one of the best players in the world and he's probably the favourite at the moment since Novak is out," Kyrgios said.

WE ARE NOW ALL SET FOR MANIC MONDAY! Bring it on!

Results from Day 7

Men's Singles, 3rd Round:

  • Jiri Vesely (CZE) bt Joao Sousa (POR x31) 6-2, 6-2, 7-5
  • Tomas Berdych (CZE x10) bt Alexander Zverev (GER x24) 6-3, 6-4, 4-6, 6-1
  • Lucas Pouille (FRA x32) bt Juan Martín Del Potro (ARG) 6-7 (4/7), 7-6 (8/6), 7-5, 6-1
  • Richard Gasquet (FRA x7) bt Albert Ramos (ESP) 2-6, 7-6 (7/5), 6-2, 6-3
  • Jo-Wilfried Tsonga (FRA x12) bt John Isner (USA x18) 6-7 (3/7), 3-6, 7-6 (7/5), 6-2, 19-17
  • Nick Kyrgios (AUS x15) bt Feliciano Lopez (ESP x22) 6-3, 6-7 (2/7), 6-3, 6-4

Women's Singles, 3rd round:

  • Serena Williams (USA x1) bt Annika Beck (GER) 6-3, 6-0
  • Svetlana Kuznetsova (RUS x13) bt Sloane Stephens (USA x18) 6-7 (1/7), 6-2, 8-6
  • Anastasia Pavlyuchenkova (RUS x21) bt Timea Bacsinszky (SUI x11) 6-3, 6-2
  • Coco Vandeweghe (USA x27) bt Roberta Vinci (ITA x6) 6-3, 6-4
  • Ekaterina Makarova (RUS) bt Barbora Strycova (CZE x24) 6-4, 6-2
  • Elena Vesnina (RUS) bt Julia Boserup (USA) 7-5, 7-5

With AFP & PTI inputs (Featured image: PTI)