Marc Sieber defeated Jannis Kahlke 6-1 6-2 in the Turkey F23 round of 16 on clay. The result followed the form book — Marc Sieber came in leading the head-to-head 1–0. Marc Sieber extended the head-to-head to 2–0.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2017-06-19 | Turkey F24 | R32 | clay | Marc Sieber | 6-4 6-1 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.