Players ATPWTA
| Name | Country |
|---|---|
| Jordan Ubiergo | FRA |
| Joseph Imeh Ubon | NGR |
| Kaichi Uchida | JPN |
| Yasutaka Uchiyama | JPN |
| Danai Udomchoke | THA |
| Kaito Uesugi | JPN |
| Benjamin Ugarte | CHI |
| Romai Ugarte | CHI |
| Camilo Ugo Carabelli | ARG |
| Daniel Uhlig | GER |
| Edmundo Ulloa | PER |
| Adrian Ungur | ROU |
| Mike Urbanija | SLO |
| Eduardo Andres Urgell Bustamante | ESP |
| Mariano Urli | ARG |
| Laslo Urrutia Fuentes | CHI |
| Vadym Ursu | UKR |
| Ricardo Urzua-Rivera | CHI |
| Atsushi Ushida | JPN |
| Dennis Uspensky | USA |
| Vaja Uzakov | UZB |
| Vladimir Uzhylovsky | UKR |