Fifth seed Rafael Nadal beat Israel's Dudi Sela 6-3 6-4 to reach the third round of the Miami Open.
The 30-year-old Spaniard broke his opponent in the fourth game before going on to claim the first set in 35 minutes.
Nadal saved two break points at 3-2 down in the second set and then broke Sela in the next game.
Nadal has reached the final in Miami four times but has yet to win the tournament.
There was little trouble for the other top seeds in action on Friday.
Second seed Kei Nishikori of Japan comfortably overcame South Africa's Kevin Anderson 6-4 6-3, while Canadian third seed Milos Raonic beat Viktor Troicki of Serbia 6-3 7-5.