Djokovic, number one on the ATP list, defeated the Italian, the ninth player in the world, after three hours and 32 minutes of play.
In the first set, Djokovic managed to take the service away from the opponent in the fourth game, and he kept that advantage until the end of the set and won it with 6: 3.
Djokovic made a break twice in the second set, in the fifth and seventh games, and convincingly brought the set to an end 6: 2.
In the third set, both tennis players managed to save their serve and the winner was decided in a tie-break, in which the Italian was safer and decided it in his favor with 7: 5.
In the fourth set, in the 12th game, Djokovic used the third set and the match ball, and thus won the set with 7: 5 and advanced to the semifinals.
In the semifinals, Djokovic will play against the Spaniard Rafael Nadal.