Murray, the 2009 champion, bounced back from a loss in his first match at Indian Wells two weeks ago. He also avoided a repeat of last year, when he lost his opening match at both Indian Wells and Key Biscayne.

With the victory, the No. 4-seeded Murray improved to 15-3 this year.

No. 13 Gilles Simon defeated qualifier Roberto Bautista-Agut 6-4, 6-2.

In women’s play, No. 9 Vera Zvonareva was upset by wild card Garbine Muguruza Blanco 6-4, 6-3.

Rafael Nadal and John Isner are among those scheduled to play later Friday. Top-ranked Victoria Azarenka was to play her opening match.

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