When will Swiss tennis great Roger Federer call it quits has been a constant topic of discussion. However, Federer, who married Mirka in 2009, has left the question to his family to answer.

"My family will essentially decide how much longer we can do this. If I sense my children are unhappy, if I am injured, if my wife, who is very supportive, is not happy, it will have an impact and the tour will be over very quickly," Federer told Aussie daily, The Australian Financial Review recently.