2023 US Open – Men's singles
Novak Djokovic defeated Daniil Medvedev in the final, 6–3, 7–6(7–5), 6–3 to win the men's singles tennis title at the 2023 US Open. It was his fourth US Open title and record-extending 24th men's singles major title overall. Djokovic became the oldest US Open men's singles champion in the Open Era, at 36 years and 111 days, as well as the first man to capture the Australian Open, the French Open, and the US Open in a season since Mats Wilander in 1988. By reaching a 47th men's singles major semifinal, Djokovic surpassed Roger Federer's all-time record, and, by reaching the final, he equaled Federer's record of reaching all major finals in a season three times.
| Men's singles | |
|---|---|
| 2023 US Open | |
| Champion | Novak Djokovic |
| Runner-up | Daniil Medvedev |
| Score | 6–3, 7–6(7–5), 6–3 |
| Draw | 128 (16 Q / 8 WC ) |
| Seeds | 32 |
Carlos Alcaraz was the defending champion, but lost in the semifinals to Medvedev. Alcaraz's loss marked the 15th consecutive year where the reigning US Open champion failed to defend the title, with Federer being the last man to do so in 2008.
Alcaraz and Djokovic were in contention for the world No. 1 singles ranking. By winning his first-round match, Djokovic regained the top ranking at the end of the tournament.
This was the final professional appearance of former world No. 8 John Isner. He lost in the second round to Michael Mmoh.