13:50 CET - Today's action is underway, and Sinner has made a flying start, fighting back from 40-15 down to break Zverev's serve in the opening game.
Follow every point of the clash here.
13:00 CET - The second semi-final of the day will pit Carlos Alcaraz against not just his opponent, but the entirety of Monte Carlo, with home hero Valentin Vacherot sending crowds wild this week with a fairytale run to the semis.
He's far more than just a plucky underdog though, with the Monegasque building on his shock triumph at the Shanghai Masters late last year - which he won as a qualifier - by working his way into the world's top 20 in 2026 and beating some top players in the process.
This week alone, he's battled past world number five Lorenzo Musetti and world number six Alex De Minaur.
However, his first-ever meeting with Alcaraz will be the biggest challenge yet of his remarkable rise.
10:40 CET - The first semi-final at Monte Carlo today sees world number two Jannik Sinner take on third seed Alexander Zverev. Both players will be making their third last-four appearance at the clay-court event, with neither having yet won the title in their careers.
The head-to-head stats favour the Italian heavily, with Sinner having won their last seven meetings, quite incredibly. What's more, Zverev has lost to his opponent twice this season already, in the semi-finals of both Indian Wells and Miami, failing to win a set either time.
If it's some consolation, the German won three of his first four matches against Sinner, but that is starting to feel like ancient history. He'll be hoping the No. 2 has an off day today, and will need to be at his very best to force an upset in Monaco.
Follow the match live here from 13:30 CET.
9:00 CET - Hello, and welcome to our coverage of the 2026 Monte Carlo Masters semi-finals. Only four men remain in the season's first major clay-court event, and today we will find out who will feature in tomorrow's tournament decider.
Most neutrals will want to see another epic final between the top two players in the world - Carlos Alcaraz and Jannik Sinner - but that is not a foregone conclusion...
Sinner will take on Alexander Zverev in the first semi, from 13:30 CET. The Italian is the favourite, but he did wobble in his third-round tie and could be pushed the distance by the third-seeded German.
After that, from 15:30 CET, Alcaraz faces local hero Valentin Vacherot, who has had a fairytale run to a first semi-final appearance on home soil and became the first Monegasque player to reach the last-four at Monte Carlo yesterday.
Can Vacherot continue the dream in his first-ever meeting with Alcaraz? The home fans will certainly be hoping so!
If you want to dive further into each match, read our in-depth preview of the semi-finals here.
Catch up on the highlights of the quarter-finals below, and find all the scores here: