An eventful first set containing five breaks of serve eventually goes the way of Belinda Bencic.

The Swiss 11th seed sends down an unreturnable serve on set point and is one set away from becoming the first woman through to the fourth round.

There is better news for home fans out on court 18 in the doubles.

Britain's Henry Patten and Finnish partner Harri Heliovaara have taken the opening set against American pair Mac Kiger and Patrik Trhac.

With no breaks of serve, former champions and number one seeds Patten and Heliovaara had to use their experience in the tie-break to take the first set 7-6 (7-5) and keep themselves in the hunt for a second men's doubles title at SW19.

Having fallen 4-1 down with a double break, Anna Kalinskaya got herself back to 4-4 in the first set against Belinda Bencic...

But then the Russian gives up her next service game, ending with a double fault.

Bencic will serve for the first set after the changeover.

Emily Salley
BBC Sport at Wimbledon

Somebody starts up a chant of "FON-SE-CA" as Roman Safiullin walks out to serve for the set, and again when Fonseca brings up his first break point.

The Russian is having none of it. After sending a piercing pass beyond Fonseca, he waves his arms, whipping up some support for himself.

He walks back to his chair with a clenched fist before remembering to apologise to the Brazilian teenager for almost whacking him with that overhead.

Image source, PA Media

Qualifier Roman Safiullin gets the first set won at the fifth time of asking and 24th seed Joao Fonseca loses a set for the first time at Wimbledon this year.

Joao Fonseca passes Roman Safiullin at the net to earn a break point, but Fonseca can't find the pass for the second consecutive point and instead plants a backhand into the net.

Safiullin covers pretty much every blade of grass on the court to bring up a fourth set point, which he is unable to take - but only because of an outrageous stroke of fortune as Fonseca's shot hits the top of the net and crawls over.

Back to deuce.

Defending champions Julian Cash and Lloyd Glasspool are in a little bit of trouble in their second-round match.

The British pair had been keeping parity on serve with French duo Corentin Moutet and Arthur Reymond up until the last game.

Serving to stay in the set, Cash and Glasspool went down 40-0, and though they saved the first, they couldn't keep themselves in it and will now have to come from a set down if they are to carry on the defence of their title.

John Lloyd
Former GB Davis Cup captain on BBC Two

As we know, when you see the players on the tour, there is no age when you know it to be when players get the game, to know the game.

Some get it at 17, knowing where to come and be on the court, some don't, and then it just happens. It could be 25 or 26 years old. They suddenly just get the game and get that variety.

Safiullin is having to use all his variety today.

Image source, PA Media

Joao Fonseca saves three set points on serve and forces Roman Safiullin to serve it out.

A really strange moment in that game as Fonseca served and then seemed to stop playing - presumably because he thought his serve clipped the net? Anyway, he allowed Safiullin's return to drift past him and lost the point.

But from 0-40 down, he found some form to extend the set by at least one more game.

Emily Salley
BBC Sport at Wimbledon

Joao Fonseca hasn't really got going yet.

Roman Safiullin is dictating play from the back of the court, shaking things up with a mix of drop shots and deep groundstrokes, and the 19-year-old is struggling with it.

There are a fair few Fonseca fans on Court Two - easily spotted in Brazilian football shirts - but he hasn't given them much to cheer about so far.

Joao Fonseca smacks a powerful backhand into the net on break point and then smacks his racquet into the turf in disappointment.

Roman Safiullin has the advantage in the first set.

While there is no British representation in the singles today, there is in the doubles.

The latest from the outside courts sees number seeds Britain's Henry Patten and Finnish partner Harri Heliovaara currently on serve in their second round match with American pair Mac Kiger and Patrik Trhac.

On court 12, defending champions and all-British pairing Julian Cash and Lloyd Glasspool are also on serve in their match against the all-French duo of Corentin Moutet and Arthur Reymond.

And it's the same story in the match involving Neal Skupski and American partner Christian Harrison on court 14.

However, it's been a difficult start for David Stevenson and Marcus Willis out on court 16. The Brits have lost the first set 6-1 to sixth seeds Marcelo Arevalo and Mate Pavic.

All matches available to watch on BBC iPlayer

Well that's one of the breaks back that Anna Kalinskaya needs to get back on track in the first set.

Belinda Bencic looked in control of her service game at 30-0 but then lost four straight points, including a double fault, to drop her serve for the first time.

Speaking of Novak Djokovic, if Joao Fonseca and Djokovic win their third-round matches today, they'll meet in round four.

They played each other at the recent French Open and Fonseca came from two sets down to beat the 24-time Grand Slam champion in a deciding set.

Wouldn't mind watching those two face each other again.

The answer to this question is in this article by our Ask Me Anything team.

Scheduling the order of play each day is a complex operation. It is decided by match referees and the Order of Play Committee.

An effort is made to put the best players and best matches on the show courts, Centre Court and Court One. This can present a challenge when deciding between whether to prioritise higher-ranked players, or those who draw larger audiences.

Tickets are more expensive for the show courts, so price is also taken into consideration when deciding which players go on the higher-profile courts.

Belinda Bencic, the 11th seed, is racing towards winning the first set against 19th seed Anna Kalinskaya.

The Swiss player's power is proving too much for Kalinskaya at the moment.

Sorry to disappoint you Marcus, but they're not on the women's doubles schedule for today...

Venus plays in the mixed doubles with Kevin Krawietz later, but you'll have to wait until tomorrow for the Williams sisters on court together - if Serena is fit.

John Lloyd
Former GB Davis Cup captain on BBC Two

One of the tell-tale signs is when you are serving, you're hitting them in the net because you are not reaching up.

Safiullin has hit a few into the net at the moment.

Safiullin recovered from 15-40 down to hold serve on that occasion and he has a 2-1 lead in the first set.

Switzerland's Belinda Bencic gets the first break of serve of her match against Russian Anna Kalinskaya, wrapping it up with a fine forehand winner.

Emily Salley
BBC Sport at Wimbledon

It's another stunning day at SW19.

I've headed over to catch Joao Fonseca and Roman Safiullin in action on Court Two, where there is no hiding from the blazing sun.

Luckily, it looks like most people have come prepared. The straw hats are on, the sun cream is out and people are keeping themselves hydrated with plenty of water and, of course, the odd glass of Pimms.

And Emily has just watched Safiullin save two break points in his latest service game.