Tenis Jugadores que empiezan por O.
- Otto Virtanen
- Oleksandr Ovcharenko
- Ole Bredschneijder
- Omar Brigida
- Orel Kimhi
- Ovcharenko/Paz
- Oana Gavrila
- Oana Gavrila/Sapfo Sakellaridi
- Oleksandra Oliynykova
- Olivia Bergler
- Olle Wallin
- Oren Vasser
- Olivia Carneiro
- Oleksandra Oliynykova/Anastasiya Konstantinova Soboleva
- Ottavia Massetti
- Oziera Ahmad
- Olivia Carneiro/Imogen Haddad
- OK BRION Challengers
- O Beloborodko, I/Krutykh
- Oleg Prihodko
- Orlando Magic
- O Lechemia, E/Nicholls
- Orel Kimhi/Ofek Shimanov
- Oana Georgeta Simion/Joelle Lilly Sophie Steur
- Offaly
- Orleans
- Orlando City
- Östersunds FK
- O Agwi, M/O'Hoisin
- Oceanne Lopez
- Olga Danilova
- Ola Abou Zekry/Ellie Blackford
- Olga Danilova/Jane Dunyon