Serena’s sister Venus was knocked out of the championships
It was a day full of surprises at Wimbledon but there were no such problems for defending men’s singles champion Roger Federer, who beat Jan-Lennard Struff in just an hour and 34 minutes on Centre Court.
The eight-time champion won 6-3 7-5 6-2 in front of the Centre Court crowd and will face France’s Adrian Mannarino in the fourth round on Monday.
Meanwhile, Serena Williams was given a thorough workout but made it through to the second week of Wimbledon.
The seven-time champion beat Kristina Mladenovic 7-5 7-6 (7/2).
Mladenovic served for the first set, but Williams survived and then stepped up in the second-set tie-break to move into the fourth round.
However, there was no such luck for the older Williams sister as Venus saw her hopes of winning a sixth Wimbledon title ended by Dutchwoman Kiki Bertens in a Court One marathon.
The American ninth seed had battled back from a set and a break down to haul herself level.
And Bertens, seeded 20th, had to call on all her reserves of energy to see off 38-year-old Williams 8-6 in the deciding set in a match lasting two hours and 40 minutes.
After Madison Keys lost 7-5 5-7 6-4 to Evgeniya Rodina earlier on Friday, Williams became the eighth of the top 10 seeds to go out in the early rounds at this year’s championships.
Elsewhere, Gael Monfils shook off injury to win in four sets against Sam Querrey, while Alexander Zverev scraped into the next round after winning in five against American Taylor Fritz.
Meanwhile Milos Raonic is locked at one-set all against Dennis Novak at the close of play.