(CNN) Roger Federer defeated defending champion John Isner in straight sets at the Miami Open on Sunday to win his 101st career singles title.

Federer won the match -- his fourth Miami crown -- 6-1, 6-4 in just 64 minutes, according to the ATP

"I think I was very clear on how I wanted to play, so I think that helped that I was able to not just have the plan but then being able to execute," the 37-year-old Swiss player said, according to the ATP.

Roger Federer and John Isner pose with their trophies.

"I just can be very happy on either end, return and serve, and that's why I'm so happy that I was able to produce a performance like this in a finals, because this is what you train for and play for that constantly keeps your level going up as the tournament progresses. And this was my best. I'm very excited."

Isner, 33, told ATP he had started feeling pain in his foot during the first set of the match.

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