Players ATPWTA
| Name | Country |
|---|---|
| Simon Friis Soendergaard | DEN |
| David Sofaer | AUS |
| Cagatay Sami Soke | TUR |
| Alex Solanki | IND |
| Christoffer Solberg | SWE |
| Joan Soler | FRA |
| Nikolai Soloviev | RUS |
| Enzo Sommer | SUI |
| Ji Hoon Son | KOR |
| Lorenzo Sonego | ITA |
| Evan Song | USA |
| Min-Kyu Song | KOR |
| Chandril Sood | IND |
| Lakshit Sood | IND |
| Louk Sorensen | IRL |
| Joao Pedro Sorgi | BRA |
| Warit Sornbutnark | THA |
| Omid Souri | IRI |
| Henrique Sousa | POR |
| Joao Sousa | POR |
| Pedro Sousa | POR |
| Patrick Sousa Oliveira | BRA |
| David Souto | VEN |
| Joao Souza | BRA |
| Vincent Spadea | USA |
| Matic Spec | SLO |
| Wil Spencer | USA |
| Marco Speronello | ITA |
| Juan-Carlos Spir | COL |
| Aleksandr Ivanovich Spirin | RUS |
| Eliot Spizzirri | USA |
| Moos Sporken | NED |
| Dominik Sproch | SVK |
| Gorazd Srbljak | MKD |
| Simon Stadler | GER |
| Sergiy Stakhovsky | UKR |
| Marco Stancati | ITA |
| Jan Stancik | SVK |
| Robin Stanek | CZE |
| Potito Starace | ITA |
| Yannick Staschen | GER |
| Jose Statham | NZL |
| Thomas Statzberger | AUT |
| Pavel Staubert | CZE |
| Cedrik-Marcel Stebe | GER |
| Saar Steele | ISR |
| Piort Stefaniak | POL |
| Jacopo Stefanini | ITA |
| Stephen Stege | USA |
| Jonathan Stenberg | SWE |