Arthur Fils, who has struggled with injury and moved gingerly for the majority of the last two sets, serves to love in the opening game of the deciding fifth set.

If there was a roof on Court Suzanne Lenglen it would have come off - this crowd is electric now.

The noise levels increase on Court Philippe Chatrier as Richard Gasquet offers resistance to Jannik Sinner's red-hot start, seeing off the two break points before picking out a winner for game point.

Denied at the first opportunity, Gasquet sticks to his task and gets over the line to stay in touch, as the French fans - including Arsenal legend Robert Pires - applaud his efforts.

Jaume Munar races through that fourth set in 23 minutes as Arthur Fils struggles to compete physically.

He's currently sat at his seat, bent forward with his head down, staring at the court.

Is this it for Fils? No it's not, as the French 14th seed walks out for the start of the deciding fifth set to a roar of applause.

He's carrying on, despite his injury.

Annabel Croft
Former British number one on BBC Radio 5 Sports Extra 2 and BBC Sounds

Jannik Sinner has completely changed the atmosphere on Court Philippe Chatrier.

He commits to the strokes and he goes after the corners. The crowd have suddenly gone very quiet.

After a promising opening service game, Richard Gasquet has been brought down to earth.

Jannik Sinner is not hanging around here. The Italian shakes his fist as Gasquet nets for two break points.

The crowd has quickly fallen flat.

Dutchman Jesper De Jong holds in the third game of the third set.

It goes to deuce and Alexander Zverev hits into the net before firing a backhand out of play as De Jong makes a promising start to the third set.

It's back-to-back holds of serve to love for Jannik Sinner, who has lost just a single point in his three games so far.

The top seed means business today, despite the home supporters desperately hoping for an unlikely shock.

Richard Gasquet, playing once again to extend his career by one more match, is obviously a huge underdog here.

To keep his career going beyond today, he would have to cause the second-biggest upset in Grand Slam history in the men's draw by ranking, as the current world number 166.

Jannik Sinner gets a first couple of opportunities to end the Frenchman's early resistance - and takes his second as Gasquet misses. The world number one strikes first.

Arthur Fils is still not moving well despite seeing the trainer again at the end of that third set, and he finds himself a double break down in the fourth.

It's frustrating for the Frenchman and disappointing for the crowd, whose noise levels have dampened again.

Fils is grimacing at the start and end of the majority of points and it feels like the end of this match may be coming sooner rather than later.

Annabel Croft
Former British number one on BBC Radio 5 Sports Extra 2 and BBC Sounds

I don't think this is one of my favourite outfits [of Jannik Sinner's]. I love green, it's my favourite colour but this is a garish green and I'm not inspired by this outfit, to be honest with you.

Excellent serving from Jannik Sinner, who holds to love to continue his rock-solid start.

Both players have settled quickly here. Good signs.

Annabel Croft
Former British number one on BBC Radio 5 Sports Extra 2 and BBC Sounds

I just have a feeling that Jannik Sinner will have to look out for the backhand down the line from Richard Gasquet.

Richard Gasquet smacks a one-handed backhand out of Jannik Sinner's reach as he takes charge on serve, and the world number one misses the baseline to cheers from the crowd as Gasquet holds to 15. Game on.

Third seed Alexander Zverev takes the second set in 32 minutes, dropping just one game on the way.

Zverev hit five winners as Jesper De Jong found himself on the back foot throughout the contest and a poor backhand from the Dutchman gives the set to Zverev, who is back in the match.

The crowd cheer excitedly as Richard Gasquet wins the first point, but Jannik Sinner quickly wraps up an opening hold of serve from there to keep the French supporters quiet for now.

As expected, a wonderful reception greets Richard Gasquet on Court Philippe Chatrier.

Muted applause follows for Jannik Sinner as the crowd make absolutely sure that the players know exactly whose side they're on here.

The stands are quickly filling up now. It remains to be seen whether Gasquet can trouble Jannik Sinner and get the home fans involved.

Annabel Croft
Former British number one on BBC Radio 5 Sports Extra 2 and BBC Sounds

Richard Gasquet probably wouldn't have wanted this match to be in any other way. It's almost perfect.

To be able to come out here on Court Philippe Chatrier, to face the world number one - the French fans appreciate how many years he has been slogging it out on the tour.

This is quite a special moment.

Jannik Sinner is on a 15-match winning streak at major tournaments after winning last year's US Open and the Australian Open in January.

He could become the first man born after 1990 to go on a 16-match winning streak at Grand Slam level.

All the energy has been zapped from the crowd as Arthur Fils skews a couple of returns wide.

Jaume Munar earns three set points and takes them at the first opportunity as Fils watches an ace fly by him - he didn't even try to get his racquet on that.

The Frenchman is struggling physically here and is in discussion with the trainer once more.

Expect a big atmosphere on Court Philippe Chatrier for this next second round match.

This could be the final match of Frenchman Richard Gasquet's career, with the 38-year-old contesting his last tournament - and his 22nd French Open.

If it's not, the former world number seven Gasquet will have earned his second win over a reigning world number one - more than 20 years after he beat Roger Federer at Monte Carlo in 2005 - and produced an almighty shock.

Jannik Sinner is aiming to become the second Italian men’s champion at the French Open in the Open era - and first since 1976.

Image source, Getty Images