She is beatable as any other player. Nothing is impossible, fear is created from Rena's on-court presence - not just her results.
that's why my posts are pessimistic , i see that Serena is vulnerable, but Maria is not good enough to beat her. I wasn't frustrated after their match at Olympics and YEC, just because Serena played exceptionally perfect. But i can't overcome this Doha's match and if Maria loses to "this" Serena in Miami it will be shameful for her ( as is for Li Na today)