ATP Players |
| A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z | |||
| O | |||
| Name | Country | Handedness | |
| Wayne Odesnik | United States | Left Handed | |
| Guillermo Olaso | Spain | Right Handed | |
| Albano Olivetti | France | Right Handed | |
| Renzo Olivo | Argentina | Right Handed | |
| Philipp Oswald | Austria | Right Handed | |
| Lamine Ouahab | Algeria | Right Handed | |
| Josselin Ouanna | France | Right Handed | |
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