Matthew Roberts defeated Marc Sieber 6-2 6-3 in the Mexico F8 round of 32 on hard.
Roberts M. took it in straight sets.
Matthew Roberts beat Marc Sieber 6-2 6-3. Umpiry, "Matthew Roberts vs Marc Sieber — Mexico F8 Round of 32", https://umpiry.com/match/2007-10-08/roberts-vs-sieber-mexico-f8-r32?utm_source=cite (as of 8 October 2007).