Aleksi Lofman defeated Naoki Tajima 7-5 6-2 in the M15 Monastir 6 q16 on hard. The upset overturned the form book — Naoki Tajima came in ranked #1391, leading the head-to-head 1–0, but Aleksi Lofman had been the form player, winning 5 of their last 7 on hard. Aleksi Lofman claimed a first win over Naoki Tajima in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2021-05-27 | M15 Kouvola 1 | R16 | hard | Naoki Tajima | 3-6 7-6(4) 6-4 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.