So that's big guns Serena Williams, Rafael Nadal and Dominic Thiem through to the second round of the French Open.

The weather might be bordering on frosty but the tournament is certainly hotting up.

It's men's number one Novak Djokovic, who no doubt will be on his best behaviour, and women's second seed Karolina Pliskova in action in the final set of first round matches on Tuesday. Briton Heather Watson faces Fiona Ferro in her first match - Watson has yet to venture past the second round here.

We'll have live coverage of those matches.

Until then.

To follow the rest of Cam Norrie's match and the others at Roland Garros can we now point you to the Live Scores page.

Cam Norrie has seen seven set points come and go...!!

He finally secures the opening set after 52 minutes. It could have been done and dusted in about 32 minutes having been 5-0 up.

It's all over on court 14. After six hours and five minutes we have a winner - it's Lorenzo Giustino.

The world number 152 and a qualifier overcame opponent Corentin Moutet following an epic fifth set.

Bravo to them both - now for a hot bath.

Here's Rafa: "I'm really happy to be back at Chatrier. Thanks to the (maximum 1,000) spectators for being here.

"Hopefully it'll be back to normal next year and I'll play in front of the beautiful crowd.

"I don't want to make any mistakes. It's a different Roland Garros this year and the weather conditions are very challenging, but we are here to try our best.

"I'm going to be playing my best and I'm happy to be in the second round."

Cameron Norrie was 5-0 up and somehow he has still not closed out this set.

He was broken for 5-1 and then squandered five set points in the next game.

Daniel Elahi Galan has not read the British script here!

Naomi Cavaday
BBC Radio 5 Live tennis commentator

It was a very strong performance from Nadal, there was a level of challenge from Gerasimov, but he dealt with it.

I think that's a better level than we saw from him in Rome. A nice little test for Nadal.

Spain's 11th seed Garbine Muguruza has just seen off the threat of Slovenia's Tamara Zidansek.

The pair were on court for three hours and one minute and Muguruza, the 2016 champion, wins it 7-5 4-6 8-6 after winning the last three games in a row.

The Belarusian then sends his return out of bounds before Nadal brings up match point with a hooked forehand winner...

It's hot and hope time for Gerasimov, who appears to be not moving as freely following that unfortunate ankle injury a few moments ago.

15-15.

However, you don't have to move much if you have a golden sliced drop.

15-30.

Two breaks points for Nadal now who holds down the B button for 'extra fury' for a forehand winner after the pace of a Gerasimov shot is taken off by the cord.

An error and Nadal has his second break and the chance to serve for the match.

Former winner Garbine Muguruza was serving to stay in the match, now she's serving to win the match after breaking the serve of Slovenia's Tamara Zidansek.

He might not be moving as freely but the lightness of touch at the net with those drop shots has been a joy to watch.

Another sees him level at 15s.

He's back!

A big serve and he holds.

Miles Maclagan
Former British Davis Cup player on BBC Radio 5 Live commentary

Gerasimov is not quite chasing as much as he was before that injury.

It's 40-0 as Nadal comes to the net to put away an easy volley.

He fluffs up his lines.

He's gone!

Gerasimov isn't moving too well - Nadal is picking him off with angled winners which don't have to find the sweet spot.

30-0.

Taken at the first time of asking as Gerasimov's forehand floats into the netting.

Is that injury affecting him?

My word. Moutet breaks to serve out for the match (again). Guistino breaks straight back (again).

At least these guys can rely on the crowd to spur them on as the match approaches its seventh hour. Oh, wait...

By our reckoning, this is now the second-longest match in Roland Garros history.