What still amazes me about that match is that Serena played really bad up till the middle of the third set. Even though she won the 2nd set, she wasn't playing well and she was frustrated with herself, nervous and unfocused. But then, when she gets her first break on the 3rd set at 5-2, her shoulders get wider, her shots go in, her game gets better and her whole body language changes. It's like... oh!! there is my Serena!! Where you been girl?? Now come on, you've got some work to do here! And the rest is history. And I don't think Kim backed off at all, she seemed to me she still was determined to win it. But I think Serena's entrance into the match messed up her concentration a little bit.... or a lot!. But definitively, one of the best come backs ever.