WATCH : The 02 arena chuckles as Federer is distracted by Sock’s backside!

The Swiss maestro Roger Federer maestro clinched his straight-set victory over Jack Sock at the ATP Finals in London. The six-time ATP Finals Swiss champion won 6-4 7-6 (7-4) at the O2 Arena on his 15th appearance at the season-ending┬átournament.…