Novak Djokovic’s US Open Loss Wasn’t an Upset. It Was Time.

NEW YORK — By the seedings, it was an upset. By what unfolded across four hours and 36 minutes inside Arthur Ashe Stadium, it was something more honest: time finally made Novak Djokovic look 39.

Mariano Navone deserves full credit. The 25-year-old Argentine, ranked No. 49, defeated the fourth-seeded Djokovic 7-6(5), 5-7, 4-6, 6-2, 6-1. He defended relentlessly, converted six of 17 break points and refused to disappear after falling behind two sets to one.

But Djokovic was not simply outplayed. He was emptied out.

The four-time US Open champion recovered from losing the opening set and moved ahead by two sets to one and a break in the fourth. Then his body gave way. He vomited multiple times, considered retiring and finished with 70 unforced errors as Navone won 12 of the final 15 games.

Djokovic said physical trouble has followed him through “pretty much every match this year.” He described nausea, cramping and pain before admitting, “Then my whole body starts to collapse.” His back and shoulder ultimately prevented him from closing the match.

That is the real story—not a bolt-from-nowhere shock, but the narrowing physical margin of an aging champion.

Djokovic can still find the shots. He can still solve an opponent and seize control of a match, as he did for long stretches Sunday. What he can no longer assume is that his body will support those answers for five sets, then recover and do it again two days later.

The numbers show the slowdown. Djokovic went 56-7 in 2023, won seven titles and collected three majors. He is 14-7 without a title in 2026. This was his second consecutive opening-match loss in the North American hard-court summer, after Thiago Agustín Tirante beat him in Cincinnati.

The extraordinary part is that it took this long. This was Djokovic’s first opening-round loss at a major since the 2006 Australian Open and his first in 20 US Open appearances. He owns a men’s-record 24 major titles, a record 38 major finals and 409 Grand Slam match victories. He did not merely meet the standard for longevity; he redefined it.

For almost two decades, Djokovic made the normal effects of age look optional. That impossible standard is why one first-round defeat now feels seismic.

Still, declaring him finished would be just as careless as pretending nothing has changed. Since winning the 2023 US Open, Djokovic is 0-for-12 at majors—but he has reached at least the semifinals in eight of those 12, including the 2026 Australian Open final and Wimbledon semifinal.

Decline and danger can coexist. Djokovic is no longer inevitable, but his skill, competitive will and determination remain capable of producing tennis almost nobody else can reach.

Navone won the match. Time won the argument. Neither result should be mistaken for a final verdict. Djokovic has spent his career making intelligent predictions look foolish. At 39, trusting his body has become harder. Betting against his mind remains dangerous.