Roger Federer took one step closer to a fourth Miami Open crown after defeating Canadian teenager Denis Shapovalov.
"It was a tactical match by me... I'm happy I was able to play with variations," said the 37-year-old Swiss, who won 6-2 6-4.
"I enjoyed it. I think I played very well. I had to. Because I think when you let Denis play, he's got some serious power, and he gets rhythm going. He can really put you in uncomfortable situations."
Defending champion Isner also bested a Canadian teenager, 18-year-old qualifier Felix Auger-Aliassime, 7-6 (3), 7-6 (4).
Real Madrid handed shock home loss as Celta Vigo spring surprise
Dubai Capitals overpower Abu Dhabi Knight Riders by 83 runs
Mid East finished strong with victory against Arabia
Norris takes F1 title as Verstappen wins Abu Dhabi race
Neser fires Australia to eight-wicket win in second Ashes test
