World tennis number three Roger Federer is planning to speak to Martina Hingis about the possibility of a mixed doubles pairing for Switzerland at the 2012 London Olympics.
Federer says he plans to see if the former teen star would at least think about coming out of retirement for next year's games.
Hingis quit the game in 2007 after testing positive for cocaine and would have to sign up for doping tests if she were to return.
Federer says he didn't know if it was realistic for him to play singles, doubles and mixed doubles at the London Games.
He says he had mentioned the possibility to Hingis "a long time ago'' but had not spoken to her about it recently.
