Updated On: 14 October, 2013 12:43 AM IST | | PA Sport
Former World No 1 Roger Federer has split with coach Paul Annacone after three and a half years.
The Swiss has slipped to seventh in the world — his lowest ranking for over a decade — and saw his hopes of reaching next month’s end-of-season ATP World Tour Finals in London dented on Thursday by his third-round exit from the Shanghai Masters at the hands of Gael Monfils.

Roger Federer and Paul Annacone