Federer rolls into fourth round at Miami Open
KEY BISCAYNE, Fla. — 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