Said the former world No. 6, "I have to put away my heart, I would say, use my brain a little bit more."

Meanwhile, Matteo Berrettini breaks back into the Top 100 and Taylor Townsend eclipses her pre-mom career-high.

The oft-injured former Top 10 player came from a break down in the first set to beat Spain's Roberto Carballes Baena, 7-5, 6-2.

The former world No. 6 saved a set point en route to his 6-3, 7-6 (5) victory Friday at the Grand Prix Hassan II.

Fellow former Top 10 players David Goffin and Fabio Fognini also advanced Tuesday.

“To be honest, that part can affect us more than the court change itself,” said Taylor Fritz, while Jessica Pegula says she has gone through "like 20 (string) tensions" in practice.

The two-time event winner was broken in the first game, but fought his way through a 2:48 victory Wednesday.

The Italian was serving with Murray leading 5-2 in the second set when he seemed to become dizzy. He was visited by a medical attendant, who checked his blood pressure before play continued.

Opportunity abounds in the Miami Open men’s singles draw, which was unveiled by tournament director James Blake and the returning Kei Nishikori in a ceremony on Monday.

Down to No. 154 in the rankings, the former world No. 6 rallied past Hugo Gaston at the ATP Challenger event Tuesday.