Results
| Challenger - Turin | 05/13 08:30 | 14 | [202] Marc-Andrea Huesler v Otto Virtanen [158] | 6-3,3-6,6-4 | |
| Challenger - Mauthausen | 05/08 12:15 | 26 | [158] Otto Virtanen v Max Hans Rehberg [479] | 7-6,6-7,5-7 | |
| Challenger - Mauthausen | 05/07 10:25 | 25 | [158] Otto Virtanen v Sebastian Fanselow [298] | 6-2,7-5 | |
| Challenger - Mauthausen | 05/06 14:40 | 25 | Otto Virtanen v Vitaliy Sachko | CANC | |
| Challenger - Aix en Provence | 04/29 13:05 | 14 | [108] Gregoire Barrere v Otto Virtanen [158] | 6-2,6-4 | |
| Challenger - Gwangju | 04/16 02:00 | 25 | [123] Jisung Nam v Otto Virtanen [161] | 6-4,6-3 | |
| Challenger - Busan | 04/09 04:10 | 25 | [201] Seongchan Hong v Otto Virtanen [159] | 6-2,6-2 | |
| ATP - Miami | 03/19 20:15 | 15 | [127] Otto Virtanen v Roberto Bautista Agut [100] | 4-6,6-4,4-6 | |
| ATP - Miami | 03/18 21:05 | 14 | [91] Jurij Rodionov v Otto Virtanen [127] | 7-6,6-7,2-6 | |
| Challenger - Lugano | 03/10 13:00 | 29 | [379] Daniel Masur v Otto Virtanen [126] | 7-6,4-6,6-7 | |
| Challenger - Lugano | 03/09 16:40 | 28 | [187] Rudolf Molleker v Otto Virtanen [126] | 1-6,3-6 | |
| Challenger - Lugano | 03/08 18:40 | 27 | [158] Pierre-Hugues Herbert v Otto Virtanen [126] | 3-6,2-6 |
Wikipedia - Otto Virtanen
Otto Virtanen (født 21. juni 2001 i Hyvinkää, Finland) er en professionel tennisspiller fra Finland.