All In: Imagine winning a Grand Slam after returning from maternity leave and then fighting back from a set down to win the SF vs Venus Williams a year later. If there's a living embodiment in tennis that "anything is possible", it's @clijsterskim. Watch her score her place in the 2010 women's singles semi-final. #USOpen _ #Tennis #Winner #Instasport #KimClijsters #VenusWilliams