Japan's world number nine Kei Nishikori is to miss the rest of the season after tearing a tendon in his right wrist.
Britain's Johanna Konta beats Kiki Bertens of the Netherlands to reach the third round at the Cincinnati Open.
Maria Sharapova is set to play in her first Grand Slam since her 15-month drugs ban after being given a wildcard for the US Open main draw.
Rafael Nadal will be the new world number one from next Monday after Roger Federer withdrew from the Cincinnati Masters due to injury.
Audio & Video
As the BBC celebrates 90 years of covering Wimbledon, Sue Barker travels the globe to meet some of the legends who have graced the famous grass courts.
Analysis and opinion from the BBC's tennis correspondent.
How to get into Tennis
How to get into tennis - a sport on the up in the UK. Find your nearest court and learn the basics with our guide
What's on BBC Sport this week
This week's sport on the BBC includes England's first Test against West Indies, the Women's Rugby World Cup and the Birmingham Grand Prix.
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