That man Fognini takes the first set against Anderson 6-4.
French Open finalist Simona Halep is a break up on No.2 Court against Lesia Tsurenko, leads 4-3
The matches in progress at the moment in the men's singles are Feliciano Lopez v Ante Pavic on Court 12, and Kevin Anderson against Fabio Fognini on Court 17.
A place in the last 16 - and the second week at Wimbledon - is at stake.
Big news from Centre Court - the roof is OPEN!
Over/under on how long that remains the case today? An hour, maybe?
We have action at Wimbledon!! Hopefully it will stay like this for the rest of the day.
Weather watch: Good news!! The covers have come off the courts as the rain has disappeared, and it looks like we will start at the delayed time of 11.45am on the outside courts.
Weather watch: Play has been delayed until 11.45am.
Thanks for joining us for our coverage of day four at Wimbledon. Here's the order of play for Friday:
Centre Court (1pm):
Djokovic v Simon
Kvitova v Venus
Murray v Bautista Agut
No.1 Court (1pm):
Li v Zahlavova Strycova
Dimitrov v Dolgopolov
Cilic v Berdych
The roof is closed and Federer and Muller are back out on court. "Good decision," says commentator Tim Henman, "because the more it rains the more slippery the court gets." Cheers for that, Tiger...
Aaaaaaaaaaand the covers are out. #rain
Lleyton Hewitt has lost the first set 7-5 against Jerzy Janowicz, whom Andy Murray battled past in last year's semi-finals.
There's the break for Federer. Chip return sets up the pass for Federer, and Muller blasts into the net.
Britain's Heather Watson beaten 6-2 5-7 6-1 by ninth seed Angelique Kerber
Maria Sharapova 5-1 up out on No.1 Court against Bacsinszky