Disagree that Vinci played great, Serena was awful those last two sets. Even easy overheads took 2-3 extra shots to put away, and sitter after sitter she hit wide or into the net. Chris Evert said afterwards that Serena looked frozen, once she started missing attempted winners off Vinci's puffballs, she had no backup plan and Vinci made her generate all of the pace herself. Vinci didn't beat herself (although she tried at times), but just a horrendous collapse by Serena.
Again, I love Serena and have rooted for her in pretty much every match her whole career, but no way Navratilova or Graf blows such a big match so badly.