By Simon Evans Reigning champion Kim Clijsters pulled out of the US Open due to a stomach muscle injury, effectively calling an early end to her season, the Belgian world number three said on Friday.
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Clijsters pulls out of US Open with injury
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Kim Clijsters ends tennis career with a loss
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Milos Raonic to miss US Open
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Kim Clijsters returns to tennis in Cincinnati
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Injuries threatening to overshadow Masters Cup
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The US Open finished the first round of qualifying
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Zvonareva withdraws from French Open with injury
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Nadal pulls out of Mercedes Cup
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Kim Clijsters withdraws from Unicef Open
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Tiger Woods pulls out of US Open
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Knicks'' amar’e Stoudemire is out indefinitely with bulging disc
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Clijsters backed to go 'full force' at Wimbledon
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Vermeulen to undergo surgery
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Ivan Ljubicic could withdraw from Croatia Open due to back problems
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Nadal to return after injury absence
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Ana Ivanovic knocked out of Australian Open in third round by Alisa Kleybanova
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Maria Sharapova pulled out of Open Gaz de France.