Kim Clijsters loses final singles match

Four-time Grand Slam champion Kim Clijsters lost in straight sets to Laura Robson of Britain in the second round of the U.S. Open on Wednesday, Aug. 29 and will head into retirement after she finishes playing in doubles at Flushing Meadows.

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Kim Clijsters of Belgium waves to the crowd before walking off court following her defeat to Laura Robson of Great Britain after their women's singles second round match on Day Three of the 2012 US Open at USTA Billie Jean King National Tennis Center on August 29, 2012 in the Flushing neigborhood of the Queens borough of New York City. (Photo by Cameron Spencer/Getty Images)
Kim Clijsters of Belgium waves to the crowd before walking off court following her defeat to Laura Robson of Great Britain after their women's singles second round match on Day Three of the 2012 US Open at USTA Billie Jean King National Tennis Center on August 29, 2012 in the Flushing neigborhood of the Queens borough of New York City. (Photo by Cameron Spencer/Getty Images)