Ramkumar Ramanathan defeated Frederik Nielsen 6-4 6-1 in the Doha qualifying round on hard. The result followed the form book — Ramkumar Ramanathan came in leading the head-to-head 1–0. Ramkumar Ramanathan extended the head-to-head to 2–0.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2021-03-08 | Doha | Q1 | hard | Ramkumar Ramanathan | 6-4 6-1 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.