Roger Federer admits he is motivated by claims that Andy Murray and Novak Djokovic are going to leave him behind and dominate tennis.
Federer returned to the summit of the world rankings after winning his 17th Grand Slam title at Wimbledon, but all the betting line talk
is of a burgeoning rivalry between Murray and Djokovic.
Murray claimed a stunning win over the Serbian at the US Open in September to break his Grand Slam duck. Djokovic responded in champion fashion...