Jonas Luetjen defeated Lukas Finzelberg 6-4 6-4 in the Germany F15 qualifying round on clay. The upset overturned the form book — Lukas Finzelberg came in leading the head-to-head 1–0. Jonas Luetjen claimed a first win over Lukas Finzelberg in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2013-08-05 | Germany F13 | R16 | clay | Lukas Finzelberg | 6-4 6-4 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.