Roger Federer said on Monday he would speak to Martina Hingis about the possibility of a dream mixed doubles pairing for Switzerland at the 2012 London Olympics.

Federer, speaking at the ATP Masters in Cincinnati, said he would talk to the now-retired Hingis to see if she would be interested.

However, the 16-time Grand Slam champion admitted he didn't know if it was realistic for him to play singles, doubles and mixed doubles at the London Games.

"Might as well just see if she is available," Federer said when asked if he would consider playing mixed doubles with Hingis in London.

"Even if she is retired, she might think about it at least," said Federer, who said he had mentioned the possibility to Hingis "a long time ago" but had not spoken to her about it recently.

Federer won doubles gold with Stanislas Wawrinka at the 2008 Beijing Olympics, but he has never won singles gold at the Games.

Hingis, playing a pro-am on the opening day of the WTA's San Diego Open earlier this month, said she wasn't thinking about coming out of retirement to play in London.