Marc Sieber defeated Jannis Kahlke 6-4 6-1 in the Turkey F24 round of 32 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.
Sieber M. took it in straight sets.
Marc Sieber beat Jannis Kahlke 6-4 6-1. Umpiry, "Marc Sieber vs Jannis Kahlke — Turkey F24 Round of 32", https://umpiry.com/match/2017-06-19/kahlke-vs-sieber-turkey-f24-r32?utm_source=cite (as of 19 June 2017).