I expected to play better: Federer after shock exit

Roger Federer cut a disconsolate figure as he tried to come to terms with his shock quarter-final exit against an inspired Tomas Berdych at the US Open.

Not since 2003 had Federer lost before the semi-final stage at Flushing Meadows, winning five titles in that time, and he went into the tournament on a high after a stellar summer.