Miami - Japan's Kei Nishikori took just over an hour to romp to a 6-2 6-2 victory over Serbian Viktor Troicki and secure a place in the fourth round of the ATP and WTA Miami Masters on Monday.
Asia's top player -- who reached the semi-finals in Miami last year -- will play the winner of the match between Poland's Jerzy Janowicz and David Goffin of Belgium.
Nishikori sent down five aces, 16 winners and broke Troicki, ranked 39 in the world, on five of six break points in a truly dominant performance.
The 25-year-old, who reached his first Grand Slam final last year the US Open where he lost to Marin Cilic, beat David Ferrer and Roger Federer on his way to the semi-finals last year only to withdraw prior to his match with Novak Djokovic due to a groin injury.
Results on Monday from the sixth day of the ATP and WTA Miami Open (x denotes seeded player):
Carla Suarez Navarro (ESP x12) bt Agnieszka Radwanska (POL x7) 5-7, 6-0, 6-4
Venus Williams (USA x16) bt Caroline Wozniacki (DEN x4) 6-3, 7-6 (7/1)
Kei Nishikori (JPN x4) bt Viktor Troicki (SRB x32) 6-2, 6-2