World number one Novak Djokovic and second ranked Rafa Nadal moved into the quarterfinals of the Sony Ericsson Open with straight set victories on Tuesday.
Djokovic, a 7-5, 6-3 winner against Richard Gasquet, had a game on his hands in the opening set when he was broken in the fourth game by a fine backhand winner from the Frenchman.
Djokovic will play Spaniard David Ferrer who beat dismissed Argentine Juan Martin del Potro 6-3, 6-3 late on Tuesday night.
Nadal, a three-time finalist at the Miami Masters series event, beat 16th seed Kei Nishikori of Japan 6-4 6-4.
The Spaniard made a sluggish start but Nishikori missed out on six of seven break point chances in the opening three games.
A forehand smash allowed Nadal to break and wrap up the first set and then it was easier going in the second set for Nadal despite a late push by the Japanese player.
Woz, Sharapova clash
Maria Sharapova and Caroline Wozniacki booked a semifinal match with Tuesday triumphs at the Miami WTA event.
Second-seed Sharapova advanced with a 6-3, 6-0 victory over eighth-seed Li Na.
Danish fourth-seed Wozniacki ended the comeback run of US 10th seed Serena Williams 6-4, 6-4.
Rafa quits post
Rafael Nadal resigned as vice-president of the ATP Player Council, saying he can no longer give the job the attention it needs. Nadal denied he was frustrated about unresolved issues in the sport. He pushed unsuccessfully for a two-year ranking system, a proposal opposed by other players, including council president Roger Federer.