The question mark is cos I can't see one today.
Anyhoo, it is my belief that one of - if not both - Federer and Nadal will lose today. Federer plays Hewitt and Nadal plays Youzhny, who as a younger man looked like a future Wimbledon champion and has won against a couple of likely sorts so far in this tournament. Hewitt is going to give Federer a much sterner test than he has had so far, and as a confirmed Wimbledon lover can take advantage if Federer is slightly losing his grip.
Murray looked quite good towards the end of his last match and will be a stern test for Gasquet, and Serena Williams won't find it easy against Bethanie Mattek.
Thanks for listening