Happiness is like a cat. If you try to coax it or call it, it will avoid you. It will never come. But if you pay no attention to it and go about your business, you'll find it rubbing up against your legs and jumping into your lap. - William Bennett
Everyone needs some! Now she has to take advantage of it but she's clearly not the favourite for the SF match.
Look at Mauresmo, she won the Aus Open with 2 retirements in her last 2 matches (and she wasn't favourite at all because she hadn't reached a Slam final in 7 years), and then #1 and no pressure or choking anymore in the late stages of slams.