Naomi Osaka beat Angelique Kerber 6-2, 6-3 on Thursday in a one-sided clash of two former world No. 1 players to reach the third round of the Miami Open, where Garbine Muguruza and Simona Halep withdrew with injuries.

Four-time Grand Slam champion Osaka made a strong start against German 13th seed Kerber, grabbing an early break to go 2-0 up and dominating on serve in a 29-minute opening set.

Osaka denied Kerber any chance of getting back into the match and had total control of her game as she went on to close out the 60-minute contest on her third match point when her opponent sent a forehand long.