Johannes Haerteis defeated Julian Lenz 7-5 3-6 6-3 in the Germany F10 qualifying round on clay. The upset overturned the form book — Julian Lenz came in leading the head-to-head 2–0. Johannes Haerteis claimed a first win over Julian Lenz in three meetings, narrowing the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2018-02-05 | Switzerland F1 | R32 | carpet | Julian Lenz | 2-6 6-1 6-4 |
| 2017-05-22 | Czech Republic F2 | SF | clay | Julian Lenz | 6-1 6-4 |
Averages over each player's completed matches in the selected window (200 vs 200). ATP, WTA & Challenger.
Each player's serve crossed against the other's return, converted to expected hold of serve. Recent completed matches, ATP, WTA & Challenger. About