Maria Sharapova survived a marathon match featuring three tie-breaks to sneak into the second round of WTA Stuttgart.
Novak Djokovic has played down fears he will miss this year's French Open, saying his wrist injury is not as serious as first feared.
Kei Nishikori marked his return from injury with a 6-1 4-6 6-3 victory over Roberto Bautista Agut at the Barcelona Open.
Rafael Nadal is aiming to secure a ninth Barcelona Open title this week.
Stanislas Wawrinka has truly taken his place at tennis' top table after his success in Monte Carlo.
Stanislas Wawrinka signalled his French Open ambitions when he beat Roger Federer 4-6 7-6 6-2 in the Monte Carlo Masters final.
Roger Federer beat an injured Novak Djokovic 7-5 6-2 to set up an all-Swiss Monte Carlo Masters final with Stanislas Wawrinka.
Novak Djokovic said on Saturday he would not be able to play tennis "for some time".
Stanislas Wawrinka produced a ruthless display to beat Spain's David Ferrer 6-1 7-6(3) to reach the Monte Carlo Masters final.
David Ferrer became only the fourth man with two wins to their name over Rafael Nadal on clay after a 7-6 6-4 win in Monaco.
Rafael Nadal admitted six weeks before his beloved French Open that he has been struggling with his confidence for months.
Defending champion Novak Djokovic thrashed Pablo Carreno 6-0 6-1 to ease into the quarter-finals of the Monte Carlo Masters.
Laura Robson will miss the French Open and Wimbledon after electing to have minor surgery on a troublesome wrist injury.
Claycourt machine Rafael Nadal recovered from a stuttering start to beat Russian qualifier Teymuraz Gabashvili 6-4 6-1.
Laura Robson has been advised to have a wrist injection which would rule her out of tennis until early June.
Novak Djokovic opened his Monte Carlo Masters title defence with a 6-1 6-0 demolition of Spanish qualifier Albert Montanes.