It has been roughly six weeks since Novak Djokovic played a competitive singles match. Rather than take part in warmup hard-court events ahead of the U.S. Open, the 24-time major champion gave himself a breather, using the break to spend time with family and prepare for the final grand slam of 2025.

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.