Federer's spat with Wawrinka could be a reason for his withdrawal from ATP , says John
Tennis | November 17, 2014 18:19 ISTJohn McEnroe fanned suggestions that a late-night rumpus with Stan Wawrinka may have contributed to Roger Federer's late withdrawal from the Barclays ATP World Finals on Sunday night. The world No 2 disappointed more than 17,000
