WASHINGTON, April 3 (Xinhua) -- Swiss Roger Federer suffered a 3-6, 6-2 and 6-3 defeat to Serbia's Novak Djokovic in the semifinal of the Miami ATP hard court tennis tournament on Friday.

    Djokovic, ranked third, will play the winner between Britain's Andy Murray and Argentine Juan Martin Del Potro in Sunday's final.

    The former world No. 1 won the first set comfortably against anerror-prone Djokovic in 25 minutes, but faded badly in the second as he made a total of 47 unforced errors.

    The Swiss won just 57 percent of first serve points in the second and it got worse in the third as Djokovic broke at the first attempt.

    "I thought I was playing okay in the first set but it was always going to be tough in the wind," said Federer, "I already felt it in the warm up. It was coming across the court. I struggled heavily. It was tough."

Novak Djokovic of Serbia celebrates after winning his semi-final match against Roger Federer of Switzerland at the Sony Ericsson Open tennis tournament in Key Biscayne, Florida April 3, 2009