Na is lucky! But someone wins the first set doesnt mean she will win the match. Many players lose the first set and win the match including Na:
2005 DUBAI HARD (O) R32 N. LI def. AI SUGIYAMA 1-6 7-6(4) 6-2
Na just got a cramp in Estoril final (cramp) two days ago.
She was not in good form mentally and physically in the first match in Berlin.
By the way, Na has very good record on clay since 2005 by 13-1