Did she fall apart mentally or did the other girl play out of her mind?
Just like a tennis match, you have to go into Oscar night ready to kill, I ought to know, I lost 4 times in a row, but I finally came up with the gold on the fifth try. I know what it is like to be labed a "loser" but you can lose 4 times and win on the fifth. Never lose hope!
Get her head straight when ther's pressure (that includes pressure of winning a lower ranked player). Otherwise someone will be quick to take advantage.
Even though Elena played extremely well today, I'm sure Momo could have played better too. She should do something about the nerves.