Jannik Sinner returned to the top of men’s tennis on Monday as the new PIF ATP Rankings confirmed the Italian as world No. 1 following his straight-sets victory over Carlos Alcaraz in the Monte-Carlo Masters final on Sunday, beginning his 67th week at the pinnacle of the sport and opening a fresh chapter in one of tennis’s most compelling rivalries.
The ranking change sees Sinner displace Alcaraz for the first time since November 2025. The pair had entered the week level on 66 weeks each at No. 1 — a statistical footnote that underlined just how evenly matched the sport’s two dominant forces have been across the past two years. With his Monte Carlo title, Sinner now holds 13,400 ranking points to Alcaraz’s 13,240, a margin that looks set to grow in the weeks ahead.
The points landscape
The arithmetic is unforgiving for Alcaraz heading into the remainder of the clay swing. The Spaniard faces a demanding defence through Barcelona, Rome and Roland Garros, where he accumulated more than 3,300 points in 2025.
Sinner, by contrast, has comparatively little to defend across the same stretch after earning zero ranking points from Monte Carlo, Madrid and the French Open last year. That asymmetry gives the Italian considerable room to extend his lead before the grasscourt season begins.
Sinner’s 2026 campaign now stands at 24 wins and two losses, with three titles claimed — Indian Wells, Miami and now Monte Carlo. By sweeping the first three Masters 1000 events of the season, he became only the second man in the Open Era to achieve that feat, joining Novak Djokovic, who accomplished it in 2015. His run of 22 consecutive wins at Masters 1000 level continues to stand as one of the more remarkable streaks in recent men’s tennis.
The bigger picture
The ranking shuffle arrives as Sinner also closes the gap on Alcaraz in the broader measure of career significance known as Big Titles — a combined count of Grand Slams, Masters 1000 crowns, the ATP Finals and Olympic gold.
The Italian now holds 14 to Alcaraz’s 15, having trailed by four as recently as January when the Spaniard completed the Career Grand Slam at the Australian Open. Three consecutive Masters crowns have redrawn that picture sharply.
What comes next
Both players are expected in Barcelona this week for the ATP 500 clay event, with Alcaraz entered as top seed and carrying the crowd as a two-time former champion at the Real Club de Tenis Barcelona.
It will be the first chance for the Spaniard to begin recouping ground immediately — and for Sinner, fresh off a fourth consecutive Masters title, to test whether the form that carried him through Monaco can transfer to the slower red clay of Catalonia.
The French Open begins May 25.
