Roger Federer rules out London after winning again at Murray . Swiss star says there is no reason to strike over tournament scheduling . Federer hands American Mardy Fish his first defeat of Saturday in boycotts . He had already qualified top of his group for Saturday 's semifinals .
Roger Federer rules out boycotts after winning again at ATP World Tour Finals . Swiss star says there is no reason to strike over tournament scheduling . Federer hands American Mardy Fish his third defeat of the week in London . He had already qualified top of his group for Saturday 's semifinals .