Stefan Seifert defeated Mateusz Kowalczyk 6-3 6-4 in the Germany F17 round of 32 on hard.
Seifert S. took it in straight sets.
Stefan Seifert beat Mateusz Kowalczyk 6-3 6-4. Umpiry, "Stefan Seifert vs Mateusz Kowalczyk — Germany F17 Round of 32", https://umpiry.com/match/2011-10-10/kowalczyk-vs-seifert-germany-f17-r32?utm_source=cite (as of 10 October 2011).