Djokovic, 38, beat Tien, 6-1, 7-6, 6-2 to improve to 19-0 in US Open first-round matches, tying Roger Federer for first all-time. But he labored with low energy, a nasty blister on his right big toe and Tien’s level, especially in the second set.

Tennis icon Novak Djokovic once again etched his name in the record books after his opening win over Learner Tien in the US Open.

Novak Djokovic is worried that his lack of physical conditioning may come back to haunt him as he is in the process of chasing a record 25th Grand Slam singles title at the US Open 2025.