Bastian Knittel defeated Michael Lammer 6-1 6-2 in the Germany F8 qualifying round on clay. The upset overturned the form book — Michael Lammer came in leading the head-to-head 2–0. Bastian Knittel claimed a first win over Michael Lammer in three meetings, narrowing the head-to-head to 2–1.
Knittel B. took it in straight sets.
Clay: level 1–1 · Hard: Lammer M. leads 1–0
Bastian Knittel beat Michael Lammer 6-1 6-2. Umpiry, "Bastian Knittel vs Michael Lammer — Germany F8 Qualifying Round", https://umpiry.com/match/2013-07-01/knittel-vs-lammer-germany-f8-qf?utm_source=cite (as of 1 July 2013).