Federer plays on his knees during the Match for Africa

Roger comes out with another trick in the USA. VIDEO

Roger Federer is well known to entertain the crowd both during competitions and exhibitions.

The world no.1 went 1 step further during the recent Match for Africa doubles in San Jose where he was teaming up with Bill Gates.

What happened?

The Federer/Gates team was leading 3-0 while Roger started to engage in a weird exchange at the net with Jack Sock to win the point while hitting a series of volleys at the net. Eventually, Federer and Gates won the set 6-3.

Exhibition stuff, but still funny.