Frank Keogh
BBC Sport

Earlier, we asked if you could name the players in doubles action on Tuesday from this photo...

The answer was, of course, Michael Chang and Mark Philippoussis, who are in the invitational doubles competition.

Chang, 44, won the 1989 French Open, while 39-year-old Philippoussis was a beaten Wimbledon finalist in 2003.

And not a bad rally on their way to clinching it either

Jonathan Jurejko
BBC Sport at Wimbledon

Every day tens of fans hover outside the fence of the Aorangi Park practice courts, waiting to shout over their heroes for a priceless snap. 

Andy Murray is usually most obliging when it comes to posing for countless selfies and signing memorabilia. 

Not today. He's scarpered out of the back door. That's when you know this Wimbledon stuff is getting serious.

Unfortunately I was the meanie who had to break the bad news to this lot...

Image source, BBC Sport

Image source, Getty Images

Marion Bartoli was supposed to be playing alongside Anne Keothavong in the invitational doubles, but was withdrawn from the competition on "medical grounds".

The Frenchwoman - who won the title in 2013 - has lost three stone in recent months saying she is returning to her "natural weight" and "tiny frame" after retirement. 

Newspaper reports claim that she is upset by the decision to replace her in the event after as assessment by a doctor on Tuesday

Frank Keogh
BBC Sport

In bright sunshine on a glorious day in SW19, spectators are starting to take their seats on Centre Court for the men's quarter-finals.

That's it - no more camping in The Queue. Standing room only. 

All tennis-obsessed personnel have been asked to vacate the area for another year, along with their tents, tipis, campfires and marshmallow supplies.

There was just one happy camper left on Wimbledon Park this morning. 

Wakey, wakey. 

Image source, BBC Sport

Jonathan Jurejko
BBC Sport at Wimbledon

Image source, BBC Sport

Andy Murray is down on the practice courts, limbering up ahead of his quarter-final against Jo- Wilfried Tsonga. It's a warm one. Muzza's grey t-shirt is soaked in sweat as he bats back Jamie Delgado's serve. 

Ivan Lendl, decked out in the violet number, stands with the air of a stern headteacher at the net. He's  clocking his pupil's every move. 

Few words are exchanged, Lendl offering the odd "nice one".

Martina Navratilova and doubles partner Safina Sfar continue to make mincemeat of the competition in the invitational doubles.

They have swept the first set against Britain's Anne Keothavong and Melanie South.

You can watch that and the rest of the day's action over on our video stream wall.

Image source, Getty Images

There is already play under way out on the outside courts.

British number ones singles specialist Johanna Konta is up and running in her doubles match. She and her American doubles partner Maria Sanchez are a break up in the opening set against Timea Babos and Yaroslava Shvedova.

A quarter-final meeting with top seeds Martina Hingis and Sania Mirza awaits if they can see that one through.

You can watch that over here. 

Caroline Chapman
BBC Sport at Wimbledon

Meet Wendy, Karen, Rachel, Kirsty, Daniel, Yvonne and Harry.

These hardy bunch from Edinburgh have been camping out since Monday morning (!) in in order to get Centre Court seats to watch their compatriot Andy Murray.

When asked how they kept themselves entertained during the long days and nights in The Queue, Rachel said: "Wine, playing cards and a bit of banter."

Sounds alright to me. 

Image source, BBC Sport

Just make sure you don't get the 'A' and 'N' reversed. "Gonady!" is a very confusing message.

Image source, Getty Images

While we are reflecting on yesterday's clincial display by the defending champion, can I recommend Tom Fordyce's Serena-watching feature.

Here is a little taster.

"The way she carries herself is half-haughty, half-asleep. As she walks from her chair to receive serve in the opening game, it takes her 23 paces to get from net-post to baseline.

"For a woman associated with unmatched physical power, each Serena step is surprisingly delicate. People have walked from bedroom to bathroom first thing in the morning at greater pace."

Lindsay Davenport
Former Wimbledon champion on BBC TV

Image source, Rex Features

She’s had to play three matches in a row and she’s cleaned up her game. She’s interested, focused. Something she does so much better now than she used to do is learn from the losses. Now I think she takes the time to think about ‘what I didn’t do right, what do I need to make better’. She really wants it. 

She’s mastered the two biggest shots in tennis – the serve and return – and no one else can really do that in women’s tennis. Some people over complicate the service motion. The other thing Serena does well is the toss, always in the same spot, it’s difficult to read.

Kieran: Going for Murray in 3, Cilic in 5, Raonic in 4 and Berdych in 5 today.

Andrew Neill: I would quite like it if people would stop asking if 'anyone can beat Andy Murray'. The universe likes answering such questions.

Laura: So excited for the Centre Court matches today.

Frank Keogh
BBC Sport

Image source, BBC Sport

After a week of rain delays, the second half of Wimbledon fortnight is being graced with warming sunshine.

There was a chunky crowd on Henman Hill (or Murray mound if you like) into the late evening on Tuesday.

From there, you can enjoy the Wimbledon big screen and some splendid views across London. Marvellous.

Image source, Getty Images

This is how we go on WImbledon's second stage:

Court One (play begins at 13:00 BST)

Querrey v Raonic

Berdych v Pouille

Martina Navratilova
Nine-time Wimbledon singles champion on BBC TV

I’m going to go out on a limb and pick the Williams sisters to go to the finals. Vesnina could play the match of her life, but if all things are normal Serena gets through that one. Venus versus Kerber is more tricky. For Kerber to win she needs to serve better and mix up the serve otherwise Venus is going to lunch on that one.

Image source, PA

Image source, Getty Images

Over on Court One, Tomas Berdych (who was famously on the wrong end of a stream of asterisked expletives from Andy Murray's wife Kim at the 2015 Australian Open, external) is taking on French 32nd seed and Grand Slam quarter-final debutant Lucas Pouille for the right to play the winner of the Murray v Tsonga.

Before that, there is one to watch from behind the sofa. Djoko-slayer Sam Querrey and Canadian lean, mean serve machine Milos Raonic will be mashing down big first shots as they attempt to win through to a semi against either Roger Federer or Marin Cilic.

Raonic (101) and Querrey (97) have hit a total of 198 aces across their eight matches so far. That is an average of 24 free points - a set's worth - for each in each match so far.

Tim Henman
Former British number one

I think the grass element is the most important aspect. The best of five sets on hard courts or clay is getting tricky for Roger but on grass, he is still one of the most offensive players. He has had a good draw, he’s played well, building up confidence and in the quarter-finals against Cilic it will be a very, very, interesting. 

So this is how we go on Centre Court this afternoon.

Centre Court (play begins at 13:00 BST)

Federer v Cilic 

Tsonga v Murray

So we are looking at around 15:00 BST for Andy Murray's appearance.

John McEnroe
Three-time Wimbledon singles champion

I think the best chance Roger is ever going to have is right here right now. His eyes lit up when Djokovic lost but Cilic will be a tough one, it will be extremely close.