[203] Denis Istomin 6-1,6-2 Ramkumar Ramanathan [215] 2021-05-26 12:00
Stadium: Court 5 Round: 15 Ground: Clay
Head to Head
| Challenger Winnetka | 2019/07/12 16:55 | Denis Istomin v Ramkumar Ramanathan | 6-2,7-5 |
| Challenger Genova | 2016/09/06 19:15 | Ramkumar Ramanathan v Denis Istomin | 3-6,4-6 |
Home History
| French Open | 2021/05/25 08:30 | Damir Dzumhur v Denis Istomin | 6-2,2-6,1-6 |
| Challenger Biella | 2021/05/17 16:25 | Denis Istomin v Thanasi Kokkinakis | 6-3,2-6,3-6 |
| Challenger Prague | 2021/05/03 11:30 | Denis Istomin v Sergiy Stakhovsky | 6-7,1-6 |
| Challenger Prague | 2021/05/02 15:15 | Denis Istomin v Peter Polansky | 6-3,7-5 |
| Challenger Ostrava | 2021/04/29 09:00 | Marc Polmans v Denis Istomin | 6-3,6-0 |
| Challenger Ostrava | 2021/04/27 08:00 | Denis Istomin v Lukas Lacko | 0-6,6-1,6-4 |
| Challenger Rome | 2021/04/19 10:30 | Denis Istomin v Alex Molcan | 3-6,6-3,1-6 |
| Challenger Rome | 2021/04/18 08:00 | Denis Istomin v Daniele Spinnato | 6-4,6-1 |
Away History
| French Open | 2021/05/25 08:30 | Ramkumar Ramanathan v Michael Mmoh | 2-6,7-6,6-3 |
| Challenger Zagreb | 2021/05/11 10:00 | Sebastian Baez v Ramkumar Ramanathan | 6-4,6-0 |
| Challenger Zagreb | 2021/05/10 08:30 | Zhizhen Zhang v Ramkumar Ramanathan | 3-6,6-7 |
| Challenger Zagreb | 2021/05/09 08:30 | Frane Nincevic v Ramkumar Ramanathan | 4-6,3-6 |
| ATP Dubai | 2021/03/14 08:30 | Ramkumar Ramanathan v Yuki Bhambri | 5-7,7-5,2-6 |
| ATP Dubai | 2021/03/13 07:00 | Evgeny Donskoy v Ramkumar Ramanathan | 4-6,4-6 |
| ATP Doha | 2021/03/08 12:50 | Ramkumar Ramanathan v Alexander Bublik | 4-6,2-6 |
| ATP Doha | 2021/03/07 12:30 | Norbert Gombos v Ramkumar Ramanathan | 3-6,1-6 |