Jannik Sinner’s run at the 2026 Qatar Open concluded in the quarter-finals after a tough loss, raising questions about his chances to claim the world No 1 ranking. The Italian, currently ranked No 2, was defeated 6-7(3), 6-2, 3-6 by Czech player Jakub Mensik in Doha on Thursday night.
Early Success and Quarter-Final Defeat in Doha
This tournament marked Sinner’s first appearance at the ATP 500 event in Qatar, where he secured wins against Tomas Machac and Alexei Popyrin before falling to the world No 16 Mensik. Despite his efforts, the 24-year-old could not advance beyond the last eight.
Ranking Implications Following Unexpected Loss
Sinner started the week with an opportunity to narrow the gap to Carlos Alcaraz, the current world No 1. Since Sinner was not defending points this week—due to missing the calendar slot last year because of a doping ban—he could have gained ground in the rankings. Meanwhile, Alcaraz entered the tournament defending 100 points from reaching the quarter-finals at Doha in 2025.
At the tournament’s outset, Sinner held 10,300 ranking points, trailing Alcaraz who had 13,150 points, a difference of 2,850. With Sinner’s exit in the quarter-finals, his chances to overtake Alcaraz were substantially reduced.
