London: Top seed and defending champion Roger Federer advanced to the Wimbledon last 16 without dropping a set after a 6-3 7-5 6-2 win over German Jan-Lennard Struff on Friday.

Federer, seeking a record ninth Wimbledon title, eased through the first set before the big-serving Struff put up more of a fight in the second. But Federer clinched it with a superb service game that included a wonderful volley at the end of a long rally followed by a winning drive down the line.

The 36-year-old Swiss proceeded to win his 29th consecutive set at the All England Club and wrap up victory on Centre Court with an ace on his first match point in just over one and a half hours.

Serena enters 4th round

Serena Williams boosted her chances of winning an eighth Wimbledon and 24th Grand Slam by making the fourth round at the All England Club on Friday as big sister Venus fell victim to the curse of the seeds. Serena, seeded a modest 25 this year, enjoyed a 7-5, 7-6 (7/2) win over France’s Kristina Mladenovic to set up a last-16 duel with Russian qualifier — and fellow mother — Evgeniya Rodina. Victory on Centre Court, sealed with a 13th ace, came 20 minutes after Venus, a five-time champion, had slumped to a 6-2, 6-7 (5/7), 8-6 loss to Kiki Bertens of the Netherlands over on Court One.

Only two of the top 10 seeds remain in the women’s draw — number one Simona Halep, who plays her third round match on Saturday, and seventh seed Karolina Pliskova who came back from 1-4 down in the second set to defeat Mihaela Buzarnescu 3-6, 7-6 (7/3), 6-1. Also exiting was 10th seed Madison Keys, who had made at least the quarter-finals of her last three majors.

The American lost 7-5, 5-7, 6-4 to Rodina, ranked 120th in the world. Stefanos Tsitsipas became the first Greek man in the Open era to make the last 16 of a Slam as the 31st seed beat Italian qualifier Thomas Fabbiano 6-2, 6-1, 6-4. The 19-year-old will face US ninth seed John Isner for a place in the quarter-finals.