(Reuters) - Jannik Sinner rolled past Tomas Machac 6-4 6-2 to reach the semi-finals of the Miami Open on Wednesday where the second seed will face either defending champion Daniil Medvedev or Nicolas Jarry.

The first set of the match played in humid conditions hinged on a Machac service game at 3-3 where the unseeded Czech's forehand missed its target on break point to give Sinner a 4-3 lead.