<p>Jannik Sinner rolled past Tomas Machac 6-4 6-2 on Wednesday to reach the semi-finals of the Miami Open, where he will face Russian Daniil Medvedev in a tantalising rematch of the Australian Open final.</p><p>Third seed Medvedev booked his place in the last four with a 6-2 7-6(7) win over Nicolas Jarry.</p><p>Sinner had to fight back from two sets down at Melbourne Park in January to beat Medvedev and capture his first Grand Slam title.</p><p>"It's going to be a tactical match, potentially," second seed Sinner told reporters. "I have to be ready if he starts off in a similar way as in Australia.</p><p>"I have to be ready and trying to understand it before. Then maybe he's going to change a couple of things. It's going to be an interesting test for me."</p><p>The opening set of the first quarter-final 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.</p><p>The Italian wrapped up the set with a love hold when Machac was unable to put a second serve back in play.</p><p>In the second set, Machac's forehand sailed long to give Sinner the break and a 2-1 lead. Sinner broke again with a backhand winner for 4-1 and closed out the contest with a serve out wide.</p><p>"I didn't exactly know what to expect today," Sinner said after his 20th win of the year.</p><p>"The first games I was looking a little bit what kind of tactics could work or not ... Today I played good, especially in the important moments of the match."</p><p>Sinner has lost only one match this year, falling in the semi-finals of Indian Wells to eventual champion Carlos Alcaraz.</p><p>Defending Miami champion Medvedev will represent another tricky test as the Russian has been in imperious form in the tournament, reaching the semis without dropping a set.</p><p>He was pushed hard in the second set of his encounter with Chilean Jarry but came through in the tiebreak, clinching on his third match point.</p><p>"The first set I feel like I was playing a good level, nothing like extra, and it was enough to win," Medvedev said.</p><p>"Tough rallies and tough points. He served better and it was a matter of a few points on the tiebreak, like it is sometimes in tennis... Happy that I managed to win."</p><p>Medvedev looked ahead to a great challenge against Sinner.</p><p>"He's playing better and better. He's confident. Even some matches I watch on TV and he's in a little trouble he manages to find solutions and that's what champions do," Medvedev added.</p>
<p>Jannik Sinner rolled past Tomas Machac 6-4 6-2 on Wednesday to reach the semi-finals of the Miami Open, where he will face Russian Daniil Medvedev in a tantalising rematch of the Australian Open final.</p><p>Third seed Medvedev booked his place in the last four with a 6-2 7-6(7) win over Nicolas Jarry.</p><p>Sinner had to fight back from two sets down at Melbourne Park in January to beat Medvedev and capture his first Grand Slam title.</p><p>"It's going to be a tactical match, potentially," second seed Sinner told reporters. "I have to be ready if he starts off in a similar way as in Australia.</p><p>"I have to be ready and trying to understand it before. Then maybe he's going to change a couple of things. It's going to be an interesting test for me."</p><p>The opening set of the first quarter-final 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.</p><p>The Italian wrapped up the set with a love hold when Machac was unable to put a second serve back in play.</p><p>In the second set, Machac's forehand sailed long to give Sinner the break and a 2-1 lead. Sinner broke again with a backhand winner for 4-1 and closed out the contest with a serve out wide.</p><p>"I didn't exactly know what to expect today," Sinner said after his 20th win of the year.</p><p>"The first games I was looking a little bit what kind of tactics could work or not ... Today I played good, especially in the important moments of the match."</p><p>Sinner has lost only one match this year, falling in the semi-finals of Indian Wells to eventual champion Carlos Alcaraz.</p><p>Defending Miami champion Medvedev will represent another tricky test as the Russian has been in imperious form in the tournament, reaching the semis without dropping a set.</p><p>He was pushed hard in the second set of his encounter with Chilean Jarry but came through in the tiebreak, clinching on his third match point.</p><p>"The first set I feel like I was playing a good level, nothing like extra, and it was enough to win," Medvedev said.</p><p>"Tough rallies and tough points. He served better and it was a matter of a few points on the tiebreak, like it is sometimes in tennis... Happy that I managed to win."</p><p>Medvedev looked ahead to a great challenge against Sinner.</p><p>"He's playing better and better. He's confident. Even some matches I watch on TV and he's in a little trouble he manages to find solutions and that's what champions do," Medvedev added.</p>