| Wikipedia | Eng / Fr | Previous events | San Diego Open |
| DEADLINE (UTC+2) | 2021-09-27 21:30:00 | Category / CUT | ATP 250 / 28 |
| Location | San Diego  |
Tennis court / Conditions | Hard (out.) |
| Dates | 2021-09-27 - 2021-10-03 | Prize Money | 600 000 USD |
| Winners |
Casper Ruud homermanu |
Ratio BWW | 74.1 % (20/27) |
(24) Adriano2000x - Adunar - anekfu - crush - dwightcharles - EvilScootus - ezequiel2014 - gasgalarza - HTS - homermanu - jeanlebosquet - jimmycornflake - LeTennis - LilArt84 - lightgas - nitsuj - PrinceGaga - SNAP - TennisElbow - ThePunisher - Toastt3 - Tono - Topper - tenedab -