At 19 years and seven months, Jannik Sinner became the 13th-youngest Masters 1000 semi-finalist, beating Alexander Bublik 7-6, 6-4 in an hour and 40 minutes. The youngster is playing only his third Masters 1000 event and is still on the title course, prevailing in the crucial moments to become the fourth-youngest Miami Open semi-finalist after Felix Auger-Alliasime, Rafael Nadal and Lleyton Hewitt!
Jannik had to work hard to topple Alexander, winning seven points more and saving seven out of nine break chances. The Italian overcame a deficit in both sets and moved over the top with three breaks on his tally to settle into the last four.
Sinner landed 36 winners and 30 unforced errors, taming his strokes nicely and edging the opponent in the shortest and more advanced rallies to cross the finish line and secure another age milestone for his generation. Alexander forced Jannik's error at the net in the third game to secure an early break and fended off three break chances in the next one to confirm the advantage.
Jannik Sinner became the fourth-youngest Miami Open semi-finalist.
The Kazakh closed the sixth game with a service winner and added four winners to his tally at 4-3 to remain in front. Returning in game ten, Sinner broke at 15 to prolong the action and his chances, saving a break point in the next one with a service winner and creating a set point in game 12.
Bublik erased it to reach a tie break that Jannik won 7-5 following Alexander's backhand mistake. Like in the opener, Bublik opened a 3-0 lead in set number two with a break in game two before Sinner pulled it back at 1-3 to stay in contention.
The Italian repelled five break chances in game six and gained a boost that carried him towards the pivotal break at 4-4. The youngster secured a break after Bublik's double fault and blasted a forehand winner a few minutes later to seal the deal and move over the top in style.
Jannik will face Roberto Bautista Agut in the semi-final, hoping to become one of the youngest Masters 1000 finalists since 1990 and continue his charge towards the top of the men's game.