LONDON, England (AFP) — Andy Murray and Serena Williams were Wimbledon’s biggest winners yesterday, but rain wreaked more havoc on the tournament, sparking fevered speculation of a Monday finish.

Murray completed his last-16 win over Marin Cilic, in a match that had already been held over from Monday, and will face Spain’s David Ferrer in today’s quarter-finals where he’ll bid to reach a fourth successive semi-final.

Four-time winner Williams put out defending champion Petra Kvitova and will meet either world number two Victoria Azarenka or unseeded Austrian Tamira Paszek in tomorrow’s semi-final.

Angelique Kerber won an all-German battle with Sabine Lisicki, the conqueror of top seed Maria Sharapova, to reach the last four for the first time and claim a tour-leading 45 wins in 2012.

She will face either Polish third-seed Agnieszka Radwanska or Maria Kirilenko of Russia, but their Court One clash was halted for the night shortly before 8:00 pm yesterday.

British fourth-seed Murray beat 16th-seeded Croatian Cilic, 7-5, 6-2, 6-3, on Court One. He will now attempt to go on to a fourth semi-final on the trot, but will first have to get past seventh-seeded David Ferrer who put out former US Open champion Juan Martin del Potro, 6-3, 6-2, 6-3 to reach the quarter-finals for the first time at the 10th attempt

Also making today’s last eight were Florian Mayer and Philipp Kohlschreiber. It’s the first time since Wimbledon in 1997 that two German men have made the last eight of a Grand Slam.

Mayer, the 31st seed, defeated Richard Gasquet of France, 6-3, 6-1, 3-6, 6-2, in another match which was held over from Monday.

For 27th-seeded Kohlschreiber, it was a particularly memorable day as he reached his first Grand Slam quarter-final at the 33rd attempt by clinching a 6-1, 7-6 (7/4), 6-3 win over American qualifier Brian Baker.

Only three of the scheduled last 16 men’s ties had been completed on Monday with Novak Djokovic, Roger Federer and Mikhail Youzhny able to enjoy a day off before today’s quarter-finals.

Federer will play Youzhny looking for a 14th win in 14 matches against the Russian.

Defending champion Djokovic will tackle Mayer, who has reached the quarter-finals for the second time, eight years after his first appearance.

Kohlschreiber will face French fifth-seed Jo-Wilfried Tsonga who reached the last eight for the third successive year by defeating American 10th-seed Mardy Fish 4-6, 7-6 (7/4), 6-4, 6-4.

In the women’s quarter-finals, Kvitova tipped Williams to win a fifth Wimbledon crown after the US sixth seed used her experience to dethrone the Czech with a 6-3, 7-5 victory.

“It is very difficult (to beat Serena). I can’t say impossible. That’s why she’s the great champion, because she knows what she needs to play in the important points. So I think that it’s really tough to beat her,” said Kvitova.

Kerber emerged victorious in the all-German clash with Lisicki after blowing four match points, the eighth seed triumphing, 6-3, 6-7 (7/9), 7-5.