Players ATPWTA
| Name | Country |
|---|---|
| Yunseong Chung | KOR |
| Dane Chuntraruk | THA |
| Erik Chvojka | CAN |
| Pawel Cias | POL |
| Miguel Cicenia | VEN |
| Roberto Cid | DOM |
| Roberto Cid Subervi | DOM |
| Marin Cilic | CRO |
| Mile Cilic | CRO |
| Patrick Ciorcila | ROU |
| Valentino Ciotti | ITA |
| Flavio Cipolla | ITA |
| Nikola Ciric | SRB |
| Andrei Ciumac | MDA |
| Andres Gabriel Ciurletti | ITA |
| Matteo Civarolo | ITA |
| Brett D. Clark | USA |
| Zeke Clark | USA |
| Curtis Clarke | GBR |
| Jay Clarke | GBR |
| Scott Clayton | GBR |
| Guilherme Clezar | BRA |
| James Cluskey | IRL |
| Flavio Cobolli | ITA |
| Andrei Cociasu | ROU |
| Rudy Coco | FRA |
| Eyal Cohen | ISR |
| Lance Cohen | RSA |
| Alessandro Colella | ITA |
| Marc Collado Castells | ESP |
| Andrea Collarini | ARG |
| Maximiliano Colorado | USA |
| Robert Coman | ROU |
| Cedrick Commin | FRA |
| Artur Completo | POR |
| Congsup Congcar | THA |
| Boris Conkic | SRB |
| Petar Conkic | SRB |
| Robert Constantinovici | ROU |
| Amerigo Contini | ITA |
| Jonathon Cooper | AUS |
| Chris Cooprider | USA |
| Marius Copil | ROU |
| Kimmer Coppejans | BEL |
| Jai Corbett | AUS |
| Andrew Corbitt | AUS |
| Gregorio Cordonnier | ARG |
| Federico Coria | ARG |
| Borna Coric | CRO |
| Victor Vlad Cornea | ROU |