| Challenger Quimper | 01/26 10:00 | 26 | [178] Otto Virtanen v Sebastian Ofner [193] | Retired | |
| Challenger Quimper | 01/25 09:00 | 25 | [178] Otto Virtanen v Giovanni M Perricard [371] | 6-4,6-2 | |
| Australian Open | 01/09 04:45 | 14 | [152] Nicolas Jarry v Otto Virtanen [175] | 5-7,6-4,7-6 | |
| ATP Pune | 12/31 08:10 | 14 | [435] Ramkumar Ramanathan v Otto Virtanen [175] | 2-6,7-5,6-2 | |
| Challenger Helsinki | 11/17 14:50 | 26 | [112] Tomas Machac v Otto Virtanen [182] | 6-4,6-2 | |
| Challenger Helsinki | 11/16 15:00 | 25 | Aleksi Lofman v Otto Virtanen | 1-6,5-7 | |
| Challenger Roanne | 11/12 16:10 | 28 | [195] Otto Virtanen v Hugo Gaston [132] | 5-7,5-7 | |
| Challenger Roanne | 11/11 20:35 | 27 | [195] Otto Virtanen v Pavel Kotov [100] | 6-1,2-6,6-2 | |
| Challenger Roanne | 11/10 15:30 | 26 | [195] Otto Virtanen v Ugo Blanchet [328] | 6-7,6-4,6-1 | |
| Challenger Roanne | 11/08 21:05 | 25 | [114] Hugo Grenier v Otto Virtanen [195] | 4-6,6-7 | |
| Challenger Bergamo | 11/06 15:30 | 29 | [168] Jan-Lennard Struff v Otto Virtanen [265] | 2-6,5-7 | |
| Challenger Bergamo | 11/05 17:45 | 28 | [265] Otto Virtanen v Nuno Borges [96] | 6-4,7-5 | |
| Challenger Bergamo | 11/04 16:35 | 27 | [116] Dominic Stephan Stricker v Otto Virtanen [265] | 4-6,6-7 | |
| Challenger Bergamo | 11/02 15:00 | 26 | [265] Otto Virtanen v Zhizhen Zhang [99] | 6-4,7-6 | |
| Challenger Bergamo | 11/01 11:35 | 25 | [265] Otto Virtanen v Manuel Guinard [134] | 6-4,7-5 | |
| Challenger Bergamo | 10/31 13:15 | 19 | [177] Antoine Bellier v Otto Virtanen [265] | 6-7,2-6 | |
| Challenger Bergamo | 10/30 20:00 | 14 | [328] Henri Squire v Otto Virtanen [263] | 4-6,6-7 | |
| Challenger Brest | 10/27 10:00 | 26 | [149] Geoffrey Blancaneaux v Otto Virtanen [263] | 7-6,6-1 | |
| Challenger Brest | 10/26 10:00 | 25 | [337] Viktor Durasovic v Otto Virtanen [263] | 7-6,3-6,4-6 | |
| ATP Sztokholm | 10/15 11:45 | 14 | [258] Otto Virtanen v Damir Dzumhur [177] | 4-6,1-6 | |
| Challenger Ismaning | 10/11 13:30 | 25 | [180] Lukas Klein v Otto Virtanen [258] | 6-1,6-4 | |
| Challenger Mouilleron le Captif | 10/07 12:35 | 27 | [173] Jelle Sels v Otto Virtanen [273] | 6-3,6-4 | |
| Challenger Mouilleron le Captif | 10/06 10:35 | 26 | [273] Otto Virtanen v Kenny de Schepper [338] | 6-2,6-4 | |
| Challenger Mouilleron le Captif | 10/04 12:15 | 25 | [317] Clement Tabur v Otto Virtanen [273] | 3-6,4-6 | |
| Challenger Orleans | 09/26 13:45 | 25 | [251] Otto Virtanen v Laurent Lokoli [205] | 6-7,3-6 | |
| Puchar Davisa | 09/17 14:30 | 5 | Otto Virtanen v Kiranpal Pannu | Cancelled | |
| Puchar Davisa | 09/16 16:30 | 2 | [252] Otto Virtanen v Ajeet Rai [411] | 6-4,6-3 | |
| Challenger Sewilla | 09/06 08:00 | 25 | [253] Otto Virtanen v Bogdan Bobrov [443] | 2-6,2-6 | |
| Challenger Como | 08/29 12:00 | 25 | [253] Otto Virtanen v Lucas Miedler [337] | Retired | |
| Challenger Banja Luka | 08/24 09:00 | 26 | [294] Nerman Fatic v Otto Virtanen [249] | 6-0,4-6,6-3 |
Wikipedia - Otto Virtanen
Otto Virtanen (ur. 21 czerwca 2001 w Hyvinkää) – fiński tenisista, zwycięzca juniorskiego Wimbledonu 2018 w grze podwójnej.