| Australian Open | 01/09 01:50 | 14 | [168] Otto Virtanen v Andrea Vavassori [155] | 0-6,3-6 | |
| ATP - Hong Kong | 01/01 04:30 | 19 | Otto Virtanen v Marc-Andrea Huesler | 2-6,0-6 | |
| ATP - Hong Kong | 12/31 05:40 | 14 | [86] Jaume Munar v Otto Virtanen [168] | 6-3,3-6,4-6 | |
| Davis Cup | 11/24 14:50 | 28 | [171] Otto Virtanen v Alexei Popyrin [40] | 6-7,2-6 | |
| Davis Cup | 11/21 16:40 | 27 | [139] Gabriel Diallo v Otto Virtanen [171] | 4-6,5-7 | |
| Challenger - Helsinki | 11/08 15:30 | 25 | [239] Denis Yevseyev v Otto Virtanen [148] | 7-5,6-3 | |
| Challenger - Brest | 10/25 10:50 | 25 | [94] Constant Lestienne v Otto Virtanen [124] | 6-2,3-6,6-3 | |
| ATP - Stockholm | 10/15 14:15 | 19 | [103] Pavel Kotov v Otto Virtanen [118] | 6-4,6-4 | |
| ATP - Stockholm | 10/14 14:50 | 14 | [158] Damir Dzumhur v Otto Virtanen [118] | 4-6,7-6,6-7 | |
| Challenger - Bratislava | 10/12 12:30 | 26 | [149] Lukas Klein v Otto Virtanen [118] | 6-4,6-4 | |
| Challenger - Bratislava | 10/11 09:00 | 25 | [118] Otto Virtanen v Liam Broady [104] | 7-6,1-6,6-2 | |
| Challenger - Mouilleron le Captif | 10/02 16:45 | 25 | [89] Hugo Gaston v Otto Virtanen [124] | 6-7,7-6,6-2 | |
| Challenger - Orleans | 09/28 10:25 | 26 | [102] David Goffin v Otto Virtanen [124] | 5-7,6-4,6-4 | |
| Challenger - Orleans | 09/27 11:40 | 25 | [124] Otto Virtanen v Lucas Poullain [288] | 6-3,6-4 | |
| Davis Cup | 09/16 13:00 | 1 | [39] Mackenzie McDonald v Otto Virtanen [125] | 6-7,6-1,6-7 | |
| Davis Cup | 09/15 13:00 | 1 | [168] Dino Prizmic v Otto Virtanen [125] | 4-6,6-3,3-6 | |
| Davis Cup | 09/12 13:00 | 1 | [68] Botic Van De Zandschulp v Otto Virtanen [125] | 6-7,4-6 | |
| US Open | 08/29 22:05 | 23 | [34] Tomas Martin Etcheverry v Otto Virtanen [133] | 6-3,6-7,1-6,6-4,7-6 | |
| US Open | 08/25 21:35 | 19 | [160] Juncheng Shang v Otto Virtanen [134] | 5-7,7-6,1-6 | |
| US Open | 08/24 14:00 | 15 | Michael Zheng v Otto Virtanen | 1-6,6-3,3-6 | |
| US Open | 08/22 20:55 | 14 | [183] Emilio Gomez v Otto Virtanen [134] | 6-1,2-6,3-6 | |
| ATP - Los Cabos | 08/02 02:45 | 25 | [127] Otto Virtanen v James Duckworth [123] | 3-6,0-6 | |
| Challenger - Zug | 07/27 13:15 | 26 | [158] Zizou Bergs v Otto Virtanen [132] | 2-6,7-6,6-3 | |
| Challenger - Zug | 07/25 12:05 | 25 | [460] Ergi Kirkin v Otto Virtanen [132] | 6-7,4-6 | |
| ATP - Gstaad | 07/18 10:05 | 25 | [132] Otto Virtanen v Juan Pablo Varillas [66] | 2-6,3-6 | |
| ATP - Gstaad | 07/16 10:00 | 19 | [130] Otto Virtanen v Hamad Medjedovic [156] | 6-7,4-6 | |
| ATP - Gstaad | 07/15 13:30 | 26 | [130] Otto Virtanen v Alexander Weis [321] | 6-3,7-6 | |
| Wimbledon | 06/29 10:30 | 19 | [153] Gijs Brouwer v Otto Virtanen [130] | 6-4,6-2,6-4 | |
| Wimbledon | 06/28 12:20 | 15 | [211] Rio Noguchi v Otto Virtanen [130] | 3-6,3-6 | |
| Wimbledon | 06/26 10:00 | 14 | [252] Henri Laaksonen v Otto Virtanen [130] | 1-6,4-6 |
Wikipedia - Otto Virtanen
Otto Virtanen (født 21. juni 2001 i Hyvinkää, Finland) er en professionel tennisspiller fra Finland.