Ugo Humbert's pre-Roland Garros campaign came to a frustrating end. The Frenchman fell to Karen Khachanov 3-6, 6-3, 7-6(4) in the Hamburg Open round of 16, a defeat that encapsulates his recent struggles on clay.

Humbert started brilliantly. Aggressive on return, sharp with his timing, the Frenchman took the opening set 6-3 with conviction. Everything pointed toward a smooth path into the quarterfinals.

Khachanov, however, found another gear in the second set. The Russian raised his serving level, found greater depth on his groundstrokes and took advantage of Humbert's growing hesitancy to level the match at one set all.

The decider was a war of attrition. Neither player managed a break, tension building with every rally until the inevitable tiebreak. At 4-4 in the breaker, Khachanov produced two clutch points to seal a 7-6(4) victory and complete the comeback.

For Humbert, the timing could hardly be worse. Five days out from Roland-Garros, the world No. 34 leaves Hamburg without a confidence-boosting result on clay and with questions about his 2026 form on this surface. Khachanov, meanwhile, will face the winner of vs Kovacevic in the quarterfinals, buoyed by a gutsy three-set revival.