GB's Dan Evans loses to Federer 4-6 2-6 2-6 on Centre
Play will be held on Sunday to clear backlog
Djokovic 6-7 1-6 Querrey when rain stopped play
GB's Tara Moore loses 1-6 6-2 3-6 to Kuznetsova
Serena Williams beats Christina McHale 6-7 6-2 6-4
BBC Sport Facebook
Fans camping overnight for Wimbledon have been practising their best tennis rants following Viktor Troicki's outburst on Thursday.
One group even set up their own umpire's chair - and threw in a Wales flag ahead of the Euro 2016 football quarter-final against Belgium tonight.
You can relive the antics from our Facebook Live right here., external
Welsh fans with BBC Radio 1's Simon Mundie
The Met Office have been on the blower.
And the Referees' Office do not like what they are hearing.
There are still some dirty splodges on the rain radar so they confirm that there will be no play on the outside courts until at least 18:15 BST.
Image source, Getty Images
Frank Keogh
BBC Sport
These pictures were taken 10 minutes apart. Which illustrates what a difference the retractable roof makes on Centre Court at Wimbledon.
As the rain comes down outside, covers go on the main court grass while the roof closes overhead. A process which usually takes about half an hour.
The moving roof weighs 1,000 tonnes and covers 5,200 square metres.
So, what are the chances of the organisers taking up their option on Middle Sunday for the first time since 2004?
Well, there is only one second-round match that is yet to get under way - Petra Kvitova's meeting with Ekaterina Makarova on Court Two.
If they could get that and all the other second round matches done by the end of today, then we could have all the men's and women's third round matches staged tomorrow and be back on schedule for the fourth round on Monday.
If not, it might be time to break glass and release that spare day.
S Williams 4-4 McHale
Serena Williams strides back onto Centre Court.
The lid has been pulled across the soft-top arena and she and Christina McHale are just knocking up.
We are level on serve in the opener.
No play? No bother.
Just start a Mexican Wave like these boys did on Court Two earlier today.
Image source, bbcOn and off more than a Made in Chelsea romance...
Image source, Getty ImagesKyrgios 6-7 (3-7) 6-1 2-6 6-4 3-3 Brown
Jonathan Jurejko
BBC Sport at Wimbledon
Finally Court Two sees something darker than Nick Kyrgios' mood. This blacker-than-coal cloud above SW19 ruins the fun just as the Aussie has a sniff of swiping Dustin Brown's serve in the decider. Kyrgios could do with a camomile tea to calm himself down.
Image source, BBC SportWimbledon 2016: Tomas Berdych hits court three's 'shot of the day'
Here's Tomas Berdych doing his best Dustin Brown impression.
V.Williams 7-5 4-6 7-6 (40-30) Kasatkina*
Lindsay Davenport
Former Wimbledon champion on BBC TV
How is that for timing? Can you believe it?
V Williams 7-5 4-6 7-6 Kasatkina
The clouds are the colour of a deep bruise.
The air goes a little chilly.
And thump...
The rain falls like gunge in one of Noel Edmonds' tanks.
Kyrgios 6-7 (3-7) 6-1 2-6 6-4 3-3 Brown
Jonathan Jurejko
BBC Sport at Wimbledon
"Come on Dustiiiiin!" Brown has a recording of a woman's voice shouting for him on a loop. It comes on after every point. Oh wait, it's actually a real woman. Dustin is lapping it up, Kyrgios isn't.
Someone else in the crowd behind Brown has a cheeky dig at a line judge's call against the German. He laughs. And that riles Kyrgios. The Aussie has a pop at Brown at the next changeover. Tetchy.
Image source, APMoore 0-1 Kuznetsova*
Jo Durie
Former Wimbledon mixed doubles champion on BBC TV
A poor start for Great Britain's Tara Moore who has her serve broken in the opening game by 13th seed Svetlana Kuznetsova.
When you play someone who has won Grand Slams and who plays classy tennis then you have to be ready.
V Williams 7-5 4-6 6-6 Kasatkina
Venus Williams and Daria Kasatikina - who was just two months old when Venus made her first Wimbledon appearance back in 1997 - are going toe to toe in the third.
Fill your boots on a Friday evening with a choice of up to 15 live video streams of action from Wimbledon.
Serena Williams is on Centre Court, her sister Venus is in a Court One decider while Nick Kyrgios and Dustin Brown are serving up a Court Two classic.
Choose which match you want to watch right here.
Moore v Kuznetsova
Great Britain's Tara Moore has just begun her second-round match against Russia's Svetlana Kuznetsova, the 13th seed in the women's singles competition.
Image source, .
Image source, .
Image source, bbcAs Dustin Brown and Nick Kyrgios go thundering down the home straight, Britain's Tara Moore and Svetlana Kuznetsova get under way over on Court Three.
Remember, there's more choice of video here than at one of those all you can eat buffets where they stick the Chinese food next to the Indian food next to the Mexican food.
You get the jist. Here's what you can munch down on...
The full list is here
Kyrgios 6-7 61 2-6 6-4 0-1 Brown
We are into a decider.
Nick Kyrgios levels up his ding-donging match with Dustin Brown out on Court One.
Image source, Getty ImagesKasatkina breaks Williams
Here's the moment Daria Kasatkina took the lead in the third set.