Sam Querrey overcomes Lukasz Kubot challenge

Sam Querrey has beaten Lukasz Kubot in three sets to book his place in round three of the Miami Masters.

Kubot broke the American instantly in the first set on his way to clinching it 6-4 before 17th seed Querrey levelled the match 6-3.

There was little to separate the two players in the deciding set, but Querrey was able to come through 6-3.

He will now take on either 14th seed Milos Raonic or Guillaume Rufin for a spot in the fourth round.