| Challenger - San Luis Potosi | 04/12 18:00 | 25 | [220] Matheus P De Almeida v Denis Istomin [296] | 7-6,1-6,3-6 | |
| Challenger - Mexico City | 04/04 20:25 | 25 | [225] Matheus P De Almeida v Denis Istomin [293] | 5-7,7-6,7-6 | |
| Challenger - Zadar | 03/21 13:50 | 25 | Dino Prizmic v Denis Istomin | 7-5,6-3 | |
| ATP - Delray Beach | 02/16 19:50 | 26 | [41] Tommy Paul v Denis Istomin [267] | 6-2,6-0 | |
| ATP - Delray Beach | 02/15 18:00 | 25 | [267] Denis Istomin v Sam Querrey [117] | 6-1,7-6 | |
| ATP - Delray Beach | 02/13 18:00 | 19 | [149] Emilio Gomez v Denis Istomin [267] | 6-7,2-6 | |
| ATP - Delray Beach | 02/12 15:00 | 14 | [267] Denis Istomin v Jurij Rodionov [153] | 6-4,6-2 | |
| ATP - Dallas | 02/06 23:00 | 14 | [124] Liam Broady v Denis Istomin [266] | 5-7,7-6,7-6 | |
| Challenger - Cleveland | 02/01 18:25 | 25 | [123] Yoshihito Nishioka v Denis Istomin [266] | 6-1,6-1 | |
| Challenger - Columbus | 01/27 18:55 | 26 | [58] Jenson Brooksby v Denis Istomin [254] | 7-5,6-1 | |
| Challenger - Columbus | 01/25 23:15 | 25 | [254] Denis Istomin v Sebastian Fanselow [348] | 7-5,1-6,6-4 | |
| Challenger - Forlì | 01/17 14:30 | 25 | [231] Pavel Kotov v Denis Istomin [254] | 6-4,6-4 | |
| Challenger - Forlì | 01/10 15:35 | 25 | [284] Borna Gojo v Denis Istomin [253] | 6-2,6-4 | |
| Challenger - Helsinki | 11/16 15:00 | 25 | [244] Denis Istomin v Henri Laaksonen [97] | 3-6,3-6 | |
| ATP - Stockholm | 11/08 19:45 | 25 | [248] Denis Istomin v Filip Krajinovic [42] | 4-6,2-6 | |
| ATP - Stockholm | 11/07 11:00 | 19 | [135] Jozef Kovalik v Denis Istomin [249] | 4-6,5-7 | |
| ATP - Stockholm | 11/06 13:35 | 14 | Jonathan Mridha v Denis Istomin | 6-2,3-6,4-6 | |
| ATP - Moskau | 10/16 09:00 | 14 | [224] Denis Istomin v Jurij Rodionov [142] | 4-6,2-6 | |
| Challenger - Alicante | 10/13 10:55 | 26 | [224] Denis Istomin v Denis Yevseyev [406] | 5-7,4-6 | |
| Challenger - Alicante | 10/11 12:20 | 25 | [305] Kyrian Jacquet v Denis Istomin [224] | Retired | |
| ATP - Indian Wells | 10/05 21:25 | 14 | [224] Denis Istomin v Ernesto Escobedo [178] | 3-6,2-6 | |
| ATP - Metz | 09/19 14:55 | 14 | [109] Philipp Kohlschreiber v Denis Istomin [226] | 7-5,6-3 | |
| Davis Cup | 09/17 17:30 | 2 | [381] Viktor Durasovic v Denis Istomin [226] | 6-4,6-4 | |
| Challenger - St. Tropez | 08/30 15:10 | 25 | [320] Kyrian Jacquet v Denis Istomin [207] | 6-4,3-6,6-1 | |
| US Open | 08/24 15:00 | 14 | [157] Jeffrey John Wolf v Denis Istomin [207] | 7-5,6-2 | |
| Olympische Spiele 2020 - Herren | 07/24 03:20 | 24 | [160] Sumit Nagal v Denis Istomin [197] | 6-4,6-7,6-4 | |
| Challenger - Nur-Sultan | 07/13 04:00 | 25 | [367] Ryan Peniston v Denis Istomin [196] | 6-1,3-6,6-3 | |
| Challenger - Porto | 07/01 12:00 | 26 | [188] Denis Istomin v Gastao Elias [240] | 5-7,4-6 | |
| Challenger - Porto | 06/28 13:20 | 25 | [188] Denis Istomin v Guido Andreozzi [203] | 6-4,6-3 | |
| ATP - Mallorca | 06/20 11:30 | 19 | [254] Lukas Klein v Denis Istomin [187] | 6-3,2-6,6-4 |
Wikipedia - Denis Istomin
Denis Olegowitsch Istomin (russisch Денис Олегович Истомин; * 7. September 1986 in Orenburg, Russische SFSR, Sowjetunion) ist ein ehemaliger usbekischer Tennisspieler.