Second seed Alexander Zverev lost just one point on serve in a dominant 6-3 6-3 win over Alexei Popyrin while John Isner, seeded third, recorded 18 aces in a 6-3 4-6 6-3 win over France’s Adrian Mannarino.Isner next faces fellow American Sam Querrey, who beat Guillermo Garcia-Lopez 6-3 6-2.Fourth seed Diego Schwartzman needed more than two hours to advance past Marius Copil 6-3 4-6 6-1. Schwartzman has returned to action after a right leg injury forced him to retire at the Rio Open last week, preventing him from defending his title.He next faces Briton Cameron Norrie, who defeated Japan’s Yoshihito Nishioka 6-2 2-6 6-2.
(Writing by Jahmal Corner in Los Angeles; Editing by Peter Rutherford)
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