The fourth-round match between Lindsay Davenport and Kim Clijsters was wonderful.
I remember seeing Davenport in the juniors at Wimbledon many years ago and you could see how well she was striking the ball but her mobility was awful.
I remember thinking to myself, "Very good player but never going to win a major" - wrong once again!
What she has done so well with is her serve, which is so brilliant, and the first strike in the groundstroke - and she's obviously improved her mobility.
It's very difficult for the other women to get her on the move because she's so strong with the groundstrokes and so accurate.
Davenport's not my favourite for the title - I still think Maria Sharapova's going to win it - but the American's got a great chance to get through in the top half.
Sharapova's looked pretty comfortable so far while Davenport against Clijsters was fabulous. If she keeps up that form, there can be no be doubt that she will reach the final.
But she's been a bit erratic throughout this year so I'm not sure about her.
As for Clijsters, she got tight at a key moment again. She had momentum going when she broke back at the end of that final set and had a chance.
I was thinking this was going to be very interesting for her to hold and then Davenport having to serve for the match.
But three double faults and a dodgy forehand and suddenly it all went away.
Federer hits form
For me, Roger Federer's win against Juan Carlos Ferrero was the first time the Swiss player has played well in these championships.
Ferrero came at him, he took chances, took the ball early, tried to really dominate from the first strike in the rally. Federer had to play well to stay with him.
It was a dangerous situation. If Federer had lost that third-set tiebreaker, they wouldn't have played the fourth set and it would have been a nasty position for Federer to go out on Tuesday at two sets to one and not have a day's rest.
Federer is like rubber almost - you see him bend to shots when you think it's past him and he flicks it back - he can use the slice and the spin. He must be an absolute nightmare to play against.
To me it was almost as if he was like, "I'm just going to win comfortably - not too much pressure - and just when I need to, I'll explode", and that's what he did against Ferrero.
The way he played against the Spaniard, particularly the last set, is bad news for the rest of the players in the draw - it was brilliant stuff.
John Lloyd was talking to John Inverdale on BBC Two.