Japanese fifth seed Kei Nishikori pulled out of Wimbledon before his second round match on Wednesday after failing to recover from a calf strain.
Roger Federer showed that time was still on his side as the Swiss master rang the closing bell on Monday's opening day at the US Open tennis championship with a quick victory at Arthur Ashe Stadium.
Fit-again Andy Roddick kept his US Open preparations on a smooth track by crushing Colombian Santiago Giraldo 6-1, 6-3 in the third round of the Winston-Salem Open on Wednesday.
Defending champion and second seed Marin Cilic led a procession of seeds into the semi-finals of the Chennai Open on Friday, a day marred by incessant rain and the subsequent delay in matches. Cilic beat Colombian Santiago Giraldo 7-6 (3), 6-1 in the day's final singles quarter-final to set up a last four meeting with the in-form fourth seed Janko Tipsarevic, the Serbian managing to eventually brush aside the challenge of Dutch rookie, Thiemo De Bakker, 7-5, 7-5.
World No 1 Novak Djokovic and the man who can dislodge him from the top spot by next week, Rafael Nadal, kicked off their China Open campaign with straight set victories on Tuesday.
Top seed Rafa Nadal ran hard-serving Canadian Milos Raonic ragged in a 7-5, 6-3 victory to secure a place in the quarter-finals of the Japan Open on Thursday.
Rafael Nadal swept aside Colombian qualifier Santiago Giraldo 6-3, 6-3 in the second round in Indian Wells.
Rafa Nadal's bid to get back to top form before the French Open suffered a setback when he crashed to a 6-4, 7-6(6) defeat to 13th-seeded Italian Fabio Fognini in the third round of the Barcelona Open on Thursday.
Two time Miami Open winner Victoria Azarenka crushed Serbia's Jelena Jankovic.
Defending champion Novak Djokovic moved confidently into the second round of Wimbledon with a 6-4, 6-4, 6-4 win over German Philipp Kohlschreiber on Monday.