Miami - Britain's second-seeded Andy Murray, the reigning Olympic and US Open champion, advanced to the third round of the ATP Miami Masters on Saturday by beating Australia's Bernard Tomic 6-3, 6-1.
Tomic managed to win only 10 points in the final set.
World No 2 Murray, who lost to top-ranked Novak Djokovic in last year's Miami final, will face either Italy's Simone Bolelli or Bulgarian 29th seed Grigor Dimitrov in his next match.
All seeds in the $8.5m hardcourt tournament received first-round byes.
Scotsman Murray, who lost to Djokovic in last year's Miami final, hopes to claim his second Miami crown after lifting the 2009 trophy with a victory over Djokovic in the final.
Murray remained perfect against Tomic, the youngest player in the ATP top 100 at age 20, after having won their only prior meeting 6-3, 6-2 last year in a semi-final at Brisbane.
Murray broke in the fifth game and then held serve for a 4-2 lead, taking full advantage of 14 unforced errors in the first six games by Tomic.
Tomic netted a backhand to hand Murray a second break, and the first set, in the ninth game of the match.
The Aussie hit back-to-back double faults to surrender a break to Murray and fall behind 3-1 in the second set. Murray broke for the fourth time to seize a 5-1 lead and then held to take the match, closing it out with his eighth ace.
Results on Saturday from the fifth day of the $8.5m WTA and ATP Masters Miami hardcourt tournament (x denotes seeding):
Richard Gasquet (FRA x8) bt Olivier Rochus (BEL) 7-5, 6-2
Sam Querrey (USA x17) bt Lukasz Kubot (POL) 4-6, 6-3, 6-3
David Goffin (BEL) bt Philipp Kohlschreiber (GER x15) 7-6 (7/5), 4-6, 6-2
Andreas Seppi (ITA x16) bt Aljaz Bedene (SLO) 7-5, 5-7, 7-5
Jo-Wilfried Tsonga (FRA x6) bt Viktor Troicki (SRB) 7-6 (8/6), 6-3
Jarkko Nieminen (FIN) bt Martin Klizan (SVK x27) 6-2, 6-2
Thomaz Bellucci (BRA) bt Jerzy Janowicz (POL x21) 7-6 (7/5), 3-6, 6-3
Andy Murray (GBR x2) bt Bernard Tomic (AUS) 6-3, 6-1
Li Na (CHN x5) bt Varvara Lepchenko (USA x25) 6-2, 6-4
Ajla Tomljanovic (CRO) bt Andrea Petkovic (GER) 0-6, 6-4, 7-6 (7/1)
Garbine Muguruza (ESP) bt Caroline Wozniacki (DEN x9) 6-2, 6-4
Agnieszka Radwanska (POL x4) bt Magdalena Rybarikova (SVK) 7-6 (7/5), 2-6, 6-3