SF Preview: Vacherot v Alcaraz, Sinner v Zverev

Saturday’s semi-final line-up at the Rolex Monte-Carlo Masters is about as good as it gets for fans and tournament organisers. We have the world’s Top 3 players — Carlos Alcaraz, Jannik Sinner and Alexander Zverev — and hometown hero Valentin Vacherot, the first Monegasque player to ever go this far at the Monte-Carlo Country Club.

And, for good measure, the battle for World No. 1 remains alive. Both incumbent Alcaraz and Sinner have spent 66 weeks throughout their careers atop the PIF ATP Rankings.

Should the seedings hold Saturday and both advance to the final, the championship match will determine which man will hold No. 1 on Monday.

Here’s a look at Saturday’s semi-finals.

The semi-finals are LOCKED 🔒#RolexMonteCarloMasters pic.twitter.com/wwOGyxQGif

— Rolex Monte-Carlo Masters (@ROLEXMCMASTERS) April 10, 2026

Jannik Sinner vs. Alexander Zverev
Sinner and Zverev are set to battle in the semi-finals for the fourth consecutive ATP Masters 1000. Sinner took out Zverev in Indian Wells and Miami last month en route to completing the ‘Sunshine Double’ and also crushed the German 6-0, 6-1 in the Paris semi-finals late last season.

Sinner is on a six-match winning streak against Zverev, although the World No. 3 won their most recent meeting on clay, an epic third-set tie-break win in the Monte-Carlo quarter-finals in 2022.

Sinner is on a 20-match winning streak at Masters 1000 level and is attempting to become the first player since Novak Djokovic in 2015 to win the year’s first three tournaments at this level. Having won Paris late last season, Sinner is also attempting to join Djokovic and Rafael Nadal as the only players to win four straight Masters 1000s.

But after seeing his streak of 37 straight sets won end at the hands of Tomas Machac in the third round, Sinner said that he’s still searching for his best form. Speaking after his 6-3, 6-4 quarter-final win over Felix Auger-Aliassime Friday, Sinner said, “It was a step forward today. I knew I had to get better in certain areas. The serve is not there yet, but all things considered I’m very happy to be into the semi-finals.”

Zverev has been a model of consistency at this level, reaching six of the past seven semi-finals. But during that run he has not pushed on to the final. The last time he reached the championship match was in Paris in 2024, when he won the title.

On Saturday, Zverev may well employ the lesson he learned during his three-set win over Joao Fonseca in the quarter-finals. The German raced to a 7-5, 3-1 lead by playing confident, aggressive tennis, but when the finish line was within sight, he went back into his shell, allowing the Brazilian teen to work his way into the match.

If he gets ahead of Sinner, Zverev will be well advised to keep going for his shots.

Making Monaco Proud 🇲🇨#RolexMonteCarloMasters pic.twitter.com/vX7y9xMCOn

— Rolex Monte-Carlo Masters (@ROLEXMCMASTERS) April 10, 2026

Carlos Alcaraz vs. Valentin Vacherot
This time last year, Monaco’s Valentin Vacherot was World No. 256 and in need of a wild card to play his hometown event. To be the fourth leg of a semi-final line-up with the world’s top 3 players a year later must seem like a fairytale.

But blending big serving, powerful ballstriking and surprising defensive capabilities to hold his own in extended rallies, Vacherot has been a revelation since advancing through qualifying last October to win the Rolex Shanghai Masters. He has won 17 of his past 20 matches at ATP Masters 1000 level to find himself at No. 17 in the PIF ATP Live Rankings, with the chance to go to No. 12 should he win the title here.

“It’s impressive, his story,” Alcaraz said of Vacherot, before he had secured his quarter-final victory over Alex de Minaur. “Obviously I would say he has a lot of motivation playing at home.

“He has won great matches in this tournament this year. I never played against him before. I just practiced once in Indian Wells, and I know he’s a pretty tough opponent to play against. I would be excited to play Vacherot if it’s in his hometown.”

Alcaraz was the standout player of last year’s clay swing, finishing with a 22-1 record and titles in Monte-Carlo, Rome and Roland Garros. He would love nothing more than to begin the 2026 clay season by defending his Monte-Carlo title.

Doubles Preview

Saturday also marks doubles semi-finals day.

Guido Andreozzi and Manuel Guinard, who upset top seeds Marcel Granollers and Horacio Zeballos Friday, continue their chase for a second Masters 1000 title in as many months following their triumph in Indian Wells.

The team takes a 1-0 edge into their meeting with fifth seeds Marcelo Arevalo and Mate Pavic, who on Friday defeated fourth seeds and Australian Open champions Christian Harrison and Neal Skupski.

Unseeded Monegasque Hugo Nys and Frenchman Edouard Roger-Vasselin play sixth seeds Kevin Krawietz and Tim Puetz, who lead the series 2-0. Nys is hoping to keep the title in Monaco for the second straight year following Romain Arneodo’s triumph last year with Guinard.