John Isner

Federer rolls into fourth round at Miami Open

Roger Federer took a look around as he entered the stadium court at the Miami Open, immediately feeling the energy of the crowd.

He gave them quite a show.

Federer advanced to the fourth round at Key Biscayne on Monday, beating Juan Martin del Potro 6-3, 6-4. Federer, who was facing del Potro for the first time since 2013, never lost serve and improved to 15-1 this year.

He broke del Potro twice, once in each set, and that was all he needed.

"I feel like I earned it more," said Federer, the 2005 and 2006 champion on Key Biscayne. "I was more the aggressor. It was more my racket, and I like it that way."

The first break put him up...

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