Belgian former tennis player Kim Clijsters celebrates her birthday today. She became the third mother to win a Grand Slam singles title in the Open Era when she beat Caroline Wozniacki in the US Open final in 2009. On her birthday, we take a look at the unique list of mothers who clinched Grand Slam singles titles.

Kim Clijsters: 2009 US Open

A great athlete that she is, Kim won her the US Open title in 2005 and she became popular thereafter. But due to certain injuries she retired from the sport in 2007. She then made a sensational comeback in 2009 after giving birth to her daughter. She won a wildcard entry at the US Open that year and went on to win it for two consecutive years. She retired in 2012.
Grand Slams - Australian Open (2011), US Open (2005, 2009, 2010)