Roger Federer has defeated a hobbling John Isner 6-1 6-4 for his 101th career title at the Miami Open.
Isner struggled to continue late in the second set on Sunday, hampered by pain in his left foot.
Federer, who won his fourth Miami title, broke Isner three times in a blazing opening set.
But the American fought back in the second, levelling the set 3-3 and 4-4 before the pain made it difficult to continue.
Federer took the final two games for the victory.