FEDERER’S FIT TO BE CHAMP

NO DOUBT whoever wins the US Open faces having his achievement belittled. Andy Murray, Stan Wawrinka, Milos Raonic, Kei Nishikori and Novak Djokovic are all missing, injured. Yet there is a reason marathon runners cannot stop the clock to catch their breath at the halfway stage. It is an endurance test — as is Grand Slam tennis. So part of the challenge is staying fit, all the way through. If Roger Federer (above) wins he will have done that, for the 20th time, at the age of 36. No asterisk required.