Murray is at his best - Federer

World number one Roger Federer admits Andy Murray is playing at his "absolute best" and blames a lack of practice for his defeat by the Scot at the Shanghai Masters.

Murray beat Federer 6-4 6-4 in the semi-final and will now face world number two Novak Djokovic in Sunday's final.

The Swiss suffered an uncharacteristic three straight double faults in the fifth game of the first set to give Murray a vital break.

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