An out-of-sorts Roger Federer smashed his racket in frustration during a 3-6 6-2 6-3 defeat by Serbia's Novak Djokovic in the semi-final of the Miami Masters tennis tournament.
Federer made 47 unforced errors and after winning the first set comfortably against an error-prone Djokovic in just 25 minutes, faded badly in the second.
Djokovic, ranked third, will now play the winner of the second semi between Britain's Andy Murray and Argentine Juan Martin Del Potro in Sunday's final.
