I could not help but wonder what happened to the Serena that appeared for the quarterfinal demolition of Ana Ivanovic. Venus is slowly turning the tables on Serena: the loss at Wimbledon (which Serena came out firing on all cylinders and appeared to be heading for victory), the loss at the Sony Ericcson Championships (a blow out) and today, a sloppy start with some erratic patches of play throughout. Don't get it twisted, Serena's physical knee pain was very visible but I think Venus played the crucial points just a little bit better than Serena today.
As a fan (because I'm definitely no one's coach), I want Serena to (above all else) focus on remaining healthy / fit, stay focused until the end of the match, move her feet (quicker and more often), hold her (sensational) serve, remain consistently aggressive (that's when she's at her unbeatable best), consistently take advantage of the break point opportunities and practice that (ill-advised) drop shot. Serena is a great on court thinker / warrior and awesome point constructor. It just seems like her knee (which caused her some discomfort) might have done her in (and was a point of distraction) for the duration of the match. Make no mistake, Venus won this battle but Serena will win the war.
Serena on her serve and the match: "I think my serve has gone somewhere on vacation and I need to go there and catch up with it. I didn't serve well. Venus played well, and served really well, which was the difference."
Serena on resting: "I am looking forward to a break before I play Miami. I really need it and I think it will be good for my knee. I have never played so much tennis in my whole career and I'm a little tired”