Image source, AP

Court two is filling up nicely ahead of Simon Halep v Zarina Diyas, Sabine Lisicki is a bigger draw out on court three though stepping out to cheers and whoops.

There are even a few hardy souls already settled into their Centre Court seats. Still an hour and a half before they see any action there.

As the knock-ups begin, take a chance to watch the best point of yesterday, Novak Djokovic's stunning match-sealing return winner against Jo-Wilfried Tsonga last night on Centre Court.

Something of the Eric Cantonas in the celebration as well.

BBC Radio 5 live

As well as being able to watch just about every ball hit in anger around the grounds today via the live streams behind the Live Coverage tab on this page, BBC Radio 5 live will be filling your ears with audio commentary goodness.

Available on the radio, on your digital telly, on your tablet computer, on your smart phone and online.

There is no getting away from those guys.

So my question to you this morning, is what Wimbledon rule would you change for the better of the players, the schedule or just your own amusement?

Extra bonus points for hitting your opponent with the ball? A quick game of "round the world" with 20 odd lucky spectators during set changeovers? Court invasions tolerated after the men's final on the final Sunday?

Your suggestions are welcome on #bbctennis,, external 81111 on text and the BBC Sport Facebook page.

Image source, Getty Images

Despite a rainy Saturday and Monday either side of it, there was, as tradition dictates, no play on a dry middle Sunday at Wimbledon this year.

Novak Djokovic thinks it is a waste of perfectly good weather.

"It was no rain, and the whole day there was no match played. No other Grand Slam has this particular rule.

"We all know that tradition is something that is nurtured here in All England Club, and we respect that.

"But there are some rules that I believe should be, you know, updated, changed, you know, for the better of the schedule and for the better of the players."

Image source, Getty Images

One of the players already into the quarter-finals after yesterday's action is Canadian Eugenie Bouchard.

To give you an idea of how youthful she is, she was named after Princess Eugenie.

She, along with Halep, is part of a wave of young women challenging queen bees like Serena Williams and Maria Sharapova.

BBC chief sports scribbler Tom Fordyce has been running a rule over the new generation.

Image source, AP

While Courts Centre and One get their shows on the road at 13:00 BST, you wouldn't catch the outside courts being so tardy.

First up on court two at 11:30 BST is third seed and French Open finalist Simona Halep against world number 72 Zarina Diyas.

While over on court three Sabine Lisicki takes on another Kazakh underdog in Yaroslva Svedova.

Perhaps the pick of the outside courts today is the second match on court three in which Milos Raonic, long touted as a future Wimbledon champion and yet to drop a set in the tournament, takes on in-form Japanese Kei Nishikori.

Image source, Getty Images

This is how Court One looks singles-wise today:

Tommy Robredo (ESP) [23] v Roger Federer (SUI) [4] - The bottom half of the men's draw was held back by Saturday's rain, meaning seven-time champion Federer meets fellow 32-year-old Tommy Robredo today in the fourth round. Robredo was the winner last time they met, eliminating Federer in the fourth round of the 2013 US Open.

Lucie Safarova (CZE) [23] v Ekaterina Makarova (RUS) [22]

Makarova knocked out fourth seed Agnieszka Radwanska. Safarova did for 10th seed Dominika Cibulkova. Neither has been beyond the third round before.

Click here for the day's full order of play.

Image source, AP

Nadal v Krygios is the filling in a high-quality Centre Court sandwich today.

Bacon and brown sauce on granary, chicken and avocado on rye, those are the sort of levels we are talking.

This is the order of play for today:

Angelique Kerber (GER) [9] v Maria Sharapova (Rus) [5] - one of three women's fourth-round matches still to be played after rain yesterday. Sharapova, ten years on from winning her sole Wimbledon title as a 17-year-old, takes on the 2012 semi-finalist,

Nick Kyrgios (AUS) v Rafael Nadal (ESP) [2] - as discussed

Petra Kvitova (CZE) [6] v Barbora Zahlavova Strycova (CZE) - Czech-not-so-matey. There are three Czechs in the last eight of the women's draw. Not bad for a nation of ten million. This match ensures at least on in the semi-finals as well.

Click here for the day's full order of play.

The tale of the tape may not look great for Nick Kyrgios, but his happy-go-lucky attitude and bruising groundstrokes, combined with Rafael Nadal's early exits in the last two years, means he is being tipped for the biggest upset yet at Wimbledon 2014.

"Teenager Nick Kyrgios has armoury to ruin Rafael Nadal's Wimbledon", external reads the Guardian headline today.

Hype? Hope? Or reality? We find out on Centre Court around 14:30 BST today.

Image source, Getty Images

"Can I beat Rafael Nadal? Sure," said 19-year-old Australian wildcard Nick Kyrgios when asked about his chances in today's fourth-round match.

Kyrgios is ranked 144 in the world. Nadal is ranked number one.

Kyrgios is yet to win a Tour title, Nadal has won 64 of them.

Kyrgios's career record in Tour matches is six wins and seven defeats. Nadal surpassed 700 wins last week.

Kyrgios has a zig-zaggy tramline shaved in one side of his head. Nadal doesn't.

As Sir Sugar would say: "Nick? You're hired."

Image source, Getty Images

Since Andy Murray has been installed among the world's best, there has been a vacancy on Centre Court. This is the job spec:

Wanted: Plucky underdog to go up against title favourites. Requires a massive lack of pedigree compared to illustrious opponent, but a determined attitude to overcome the odds. Quirky props, such as Jeremy Bates' lucky jumper or Barry Cowan's walkman, are an asset.

How's that CV shaping up Nick Kyrgios?