Rafael Nadal through at Miami Masters

Rafael Nadal has booked his place in the last 16 of the Miami Masters with a comfortable straight-sets win over Radek Stepanek.

Despite early resistance from the world number 28, the relentless Nadal forced two breaks of serve before he took the opening set 6-2.

The world number three found a break early on in the second as he held off the plucky Czech to break again and claim the set 6-2.

The Spaniard will face the Japanese world number 16 Kei Nishikori in the next round of the tournament.