Of course before start of every point you should take a few deep breaths and focus... but also, after winning every point you should celebrate, exult and enjoy yourself - as if you won the tournament. Like Carolina does.
When you exult like that we that enthusiasm, you put yourself in the positive mode of course, but you also convey to the other player your self-belief... that may be you are down in points, but you have that self-belief that you have won the point and believe that you are there to win the match.
So express yourself, celebrate, become happy, get enchanted after winning the point. Then, focus again.
