MIAMI - Unruffled by a bomb scare that locked down the Sony Open late on Tuesday, world number one Rafael Nadal brushed past Italy's Fabio Fognini 6-2 6-2 to join Novak Djokovic, Roger Federer and Andy Murray in the last eight.
Officials announced a suspicious package had been left near the main entrance to the sprawling tennis facility which was quickly locked down, keeping thousands of spectators from entering or leaving while Miami Dade police investigated.
The all clear was given just before Nadal stepped onto the Crandon Park centre court to face Fognini in the final match of the night.
The Spaniard showed no signs of being alarmed by the bomb scare as he completed the win in 62 minutes.
"Every day I have to try to find my rhythm, try to think about myself, what I have to do well, so I just try to be focused on what I really need to do to play well," said Nadal. "Then the opponent is free to do whatever. Tonight was not an easy match for him, for the conditions that I told you before. So it was a little bit strange, but in general, I think I was very focused and solid with my serve."
Nadal's next opponent is Canadian Milos Raonic, who beat Benjamin Becker 6-3 6-4.
"He's a very dangerous opponent," added the Spaniard. "His serve is huge, one of the best without any doubt, and he's able to play very aggressive on the return because he doesn't feel a lot of pressure on his return because he knows that he's very safe with his serve."
Nadal's great rival Federer was also in cruise control, needing just 49 minutes to dismiss ninth seeded Frenchman Richard Gasquet 6-1 6-2.
"Look, things went well out on the court today," said the Swiss 17-times grand slam winner. "You just take what you get and you run with it. "I think I played well. I served well. I made my returns I had to and stayed aggressive, so I didn't let him just make errors.
"I forced him to do stuff. It was a good match for me."
Defending champion Murray, playing his first event since splitting with coach Ivan Lendl last week, has looked increasingly comfortable and confident on his own.
He disposed of 11th-seeded Frenchman Jo-Wilfried Tsonga 6-4 6-1 without facing a single break point.
Djokovic, a three-time winner on the Miami hardcourts, had only two break points the entire match but that was all the second seeded Serb needed, converting both chances on his way to a 6-3 7-5 win over Spaniard Tommy Robredo.
Not everything at Crandon Park tennis centre went according to script, however, as Japan's Kei Nishikori and Ukraine's Alexandr Dolgopolov pulled off a pair of fourth-round upsets.
Dolgopolov battled to a 6-4 3-6 6-1 win over Swiss third seed and Australian Open champion Stanislas Wawrinka, while Nishikori shocked fourth seeded Spaniard David Ferrer 7-6(7) 2-6 7-6(9).