Novak Djokovic has been knocked out of the US Open in the first round following an upset defeat.

The Serbian star, a multiple-time US Open champion, was unable to advance beyond the opening round of the tournament.

The early exit represents a major setback for Djokovic, who has continued to compete at the highest level despite being in the latter stages of his career.

The defeat also ends his latest bid for another Grand Slam title and further highlights the increasingly competitive nature of men’s tennis.

Djokovic has won 24 Grand Slam singles titles and is seeking to add to his record haul of major championships.

The Serbian has remained a leading figure on the ATP Tour, although younger players have increasingly challenged his dominance at Grand Slam events.

His first-round elimination will now see him turn his attention to the remainder of the 2026 season.