Andrea Petkovic defeated Maria Penkova 6-1 6-0 in the Sofia 25K semi-final on clay.
Petkovic A. took it in straight sets.
Andrea Petkovic beat Maria Penkova 6-1 6-0. Umpiry, "Andrea Petkovic vs Maria Penkova — Sofia 25K Semi-final", https://umpiry.com/match/2006-09-11/penkova-vs-petkovic-sofia-25k-sf?utm_source=cite (as of 11 September 2006).