Kim Clijsters fell in the second round of the 2012 U.S. Open, losing to Great Britain's Laura Robson in straight sets, 7-6 (7-4), 7-6 (7-5), putting an end to her storied career.

Clijsters announced prior to the U.S. Open that she'd retire after the conclusion of it, though few expected her exit to come so soon. Clijsters had not lost at the U.S. Open since she lost in the finals in 2003, winning the tournament in 2005, 2009 and 2010. In the other years, she did not participate in the tournament.

Robson, meanwhile, advanced to the third round and will face China's Na Li.

Clijsters, though, is the story, as she ends her career with four Grand Slam victories -- the three U.S. Open titles and the 2011 Australian Open. Though she never won the French Open, Clijsters advanced to the finals twice, in 2001 and 2003.

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