13 October 2012 Last updated at 17:39

Andy Murray surprised by Roger Federer's double faults

Andy Murray says he beat Roger Federer by being "aggressive" and capitalising on some poor serving from the Swiss in the Shanghai Masters semi-final.

The Scot defeated Federer 6-4 6-4 and will now face world number two Novak Djokovic in Sunday's final.

Murray took the first set after three straight double faults from Federer gifted him a pivotal break.