Marc Sieber defeated Marko Lenz 6-1 7-6 in the Czech Republic F2 round of 16 on clay.
Sieber M. took it in straight sets.
Marc Sieber beat Marko Lenz 6-1 7-6(4). Umpiry, "Marc Sieber vs Marko Lenz — Czech Republic F2 Round of 16", https://umpiry.com/match/2012-05-14/lenz-vs-sieber-czech-republic-f2-r16?utm_source=cite (as of 14 May 2012).