US Open: Novak Djokovic's defeat sparks questions over his future

Novak Djokovic suffered his earliest US Open elimination in 18 years, losing to Alexei Popyrin in the third round. Djokovic's season concludes without a Grand Slam title, as he lost in other major tournaments this year to Jannik Sinner and Carlos Alcaraz. The loss raises concerns about his long-term prospects in professional tennis.