| Event: | Men's singles |
| Championship: | 2021 Summer World University Games |
| Dates: | – |
| Venue: | Sichuan International Tennis Centre |
| Location: | Chengdu, China |
| Competitors: | 45 |
| Nations: | 25 |
| Gold: | Henry von der Schulenburg |
| Goldnoc: | SUI |
| Silver: | Kasidit Samrej |
| Silvernoc: | THA |
| Bronze: | Sergey Fomin |
| Bronzenoc: | UZB |
| Bronze2: | Jang Yun-seok |
| Bronzenoc2: | KOR |
| Prev: | 2019 |
| Next: | 2025 |
| Biannual: | yes |
| Multi: | yes |
| Type: | mixed and team |
See main article: Tennis at the 2021 Summer World University Games.
The men's singles tennis event at the 2021 Summer World University Games was held from 29 July to 6 August at the Sichuan International Tennis Centre in Chengdu, China.
Switzerland's Henry von der Schulenburg won the gold medal, defeating Thailand's Kasidit Samrej in the final, 7–6(7–5), 4–6, 6–1.
Uzbekistan's Sergey Fomin and South Korea's Jang Yun-seok won the bronze medals.
All seeds receive a bye into the second round.[1]
All seeds receive a bye into the second round.[2]