Rafael Nadal starts the defence of his US Open tennis title in New York shortly against the man who usurped him at the top of the tennis world, Novak Djokovic.
Since Nadal beat Djokovic in last year's final, the Serb has beaten the Spaniard in five finals this year, including Wimbledon.
Djokovic saved two match points before winning his semi-final against Roger Federer in five sets, and Nadal knows he'll have to be at the top of his game to win the final grand slam of the year.
The final gets underway at 8am.
