Navone Defeats Djokovic in Five-Set U.S. Open Upset

Mariano Navone defeated Novak Djokovic in five sets on the opening day of the U.S. Open, producing the first major upset of the 2026 tournament. Navone won 7-6, 5-7, 4-6, 6-2, 6-1 after Djokovic had taken a two-sets-to-one lead.

The official U.S. Open site listed the result and highlighted Navone's first-round breakthrough. Associated Press independently reported that the loss was Djokovic's earliest exit from a Grand Slam tournament in more than 20 years. The result ends this title bid; it does not change the 24 major singles championships already on his record.

Navone's path mattered as much as the final set. He secured the opening tiebreak, absorbed Djokovic's response in the next two sets and then reversed the match with sustained pressure. Winning nine of the last ten games turned a competitive contest into a decisive finish.

Five-set matches test more than shotmaking. Recovery between points, service efficiency, return depth and movement can change rapidly after several hours. A player who trails two sets to one must win both remaining sets, leaving no margin for a brief lapse. Navone managed that pressure while Djokovic could not regain control.

An upset is measured against ranking, history and expectation, not against a claim that the favorite lacked achievement or effort. Djokovic entered with unparalleled major experience. Navone entered with an opportunity to establish his own hard-court result on one of tennis's largest stages. The score, rather than speculation about motivation, is the reliable record.

Opening-day results also included advances by Jessica Pegula and Daniil Medvedev. Those matches belong to separate draws and should not be used to predict Navone's next round. Tournament schedules, recovery time, weather and the next opponent will shape the immediate challenge.

Medical or injury explanations require direct confirmation from a player, tournament physician or official press conference. Visible fatigue alone is not enough to diagnose a condition. Post-match remarks can add context without changing the completed result.

Official point-by-point statistics can clarify how serve, return and unforced-error patterns changed as the match entered its final two sets.

The verified development is Navone's five-set victory and Djokovic's first-round elimination. Claims that the tournament title is now assured for another player ignore the remaining field. The next authoritative record will be Navone's second-round match, official statistics and any confirmed post-match explanation from the players. For now, the upset stands as a complete result: a comeback from two sets to one down, closed with a dominant deciding set.