Players ATPWTA
| Name | Country |
|---|---|
| Oscar Torres | COL |
| Giulio Torroni | ITA |
| Goran Tosic | SRB |
| Csongor Toth | HUN |
| Junya Toyono | JPN |
| Stefano Travaglia | ITA |
| Petar Trendafilov | BUL |
| Matteo Trevisan | ITA |
| Beauregard Treyz | USA |
| Bastian Trinker | AUT |
| Jonas Trinker | AUT |
| Viktor Troicki | SRB |
| Ty Trombetta | USA |
| Wishaya Trongcharoenchaikul | THA |
| Caleb Troy | USA |
| Christian Trubrig | AUT |
| Marco Trungelliti | ARG |
| Walter Trusendi | ITA |
| Chun Hsin Tseng | TPE |
| Stefanos Tsitsipas | GRE |
| George Tsivadze | GEO |
| Jo-Wilfried Tsonga | FRA |
| Pavel Tsoy | UZB |
| Alexandre Tsuchiya | BRA |
| Li Tu | AUS |
| Igor Tubic | SWE |
| Roman Tudoreanu | MDA |
| Gabriel Tumasonis | BRA |
| Nicolo Turchetti | ITA |
| Thales Turini | BRA |
| Mert Naci Turker | TUR |
| Dmitry Tursunov | RUS |
| Marshall Tutu | GBR |
| Julius Tverijonas | LTU |
| Maxim Tybar | BLR |
| Daniel Tyntaryov | ISR |
| Evgeny Tyurnev | RUS |
| 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 |