World No 2 Novak Djokovic could miss the French Open after revealing he is suffering from a nagging wrist injury.
Roger Federer clinched a 7-5 6-2 victory over Novak Djokovic to set up an all-Swiss final at the Monte Carlo Masters.
Czech Republic and Germany both opened 2-0 leads in their Fed Cup semi-finals on Saturday.
Dominika Cibulkova battled through another marathon to book her place in the final of the Malaysian Open.
Rafael Nadal suffered a shock exit at the Monte Carlo Masters as Novak Djokovic and Roger Federer set up a semi-final.
Top seed Dominika Cibulkova advanced to the semi-finals of the BMW Malaysian Open on Friday.
Laura Robson will miss the French Open and Wimbledon after deciding to have minor wrist surgery.
Britons Johanna Konta and Heather Watson have just missed out on a place in the main draw of the French Open.
Andy Murray and Martina Navratilova are among a host of star names who will help raise money in June to fight cancer.
The full schedule for this year's expanded WTA Championships in Singapore has been announced.