Jesper de Jong is looking comfortable during this service game as he outplays Alexander Zverev in a short rally before getting to game point with a big first serve.

The Dutchman wraps up the game with an ace down the middle.

Zverev will now serve to stay in the set.

Alexander Zverev has Jesper de Jong scurrying all over the place during a 19-shot rally before securing the hold with the Dutchman unable to get a backhand over the net.

After all the sun this week, it's just started to rain at Roland Garros.

It's not heavy enough to disrupt play yet and the players are carrying on as normal on Court Philippe Chatrier.

There is a roof on the main show court, so even if the rain does fall at some stage, there shouldn't be too long of a delay before a resumption.

Jesper de Jong comes through a testing game with a neat volley at the net and a big first serve which Alexander Zverev can only skew into the Paris sky.

Shot of the match so far as Alexander Zverev guides a backhand return winner across court, drawing oohs from the crowd on Court Philippe Chatrier.

Zverev follows it up by polishing off a lengthy rally with a backhand winner to the other side of the court for break point.

Jesper de Jong saves it with a big first serve to take the game to deuce.

Image source, Getty Images

Spanish teenager Rafael Jodar, the 27th seed, has fought back from two sets down to force a deciding set with fellow Spaniard Pablo Carreno Busta on Court Suzanne-Lenglen.

Alexander Zverev's big first serve sees the German get to 40-0 before a forehand winner wrong-foots Jesper de Jong.

There's little between the two at the moment with Zverev recovering from his shaky start.

Jesper de Jong secures a brisk hold to love with Alexander Zverev unable to trouble his serve.

The Dutchman will be happy with how he's started this match so far.

Alexander Zverev has to hold his nerve at the net during a ping pong exchange and the German celebrates with a celebratory fist pump.

He wraps the game up with a serve and volley to level the score in the first set.

A "come on" from Alexander Zverev as he fights to 0-30 before Jesper de Jong puts a forehand long to gift three break points.

There are the first signs Zverev is starting to find his rhythm here as a handful of crisp strokes is finished off by a forehand winner for the break back.

Image source, Getty Images

• In-form Marta Kostyuk ended Iga Swiatek's hopes of a fifth French Open singles title, beating the Polish third seed in straight sets.
• Kostyuk will play fellow Ukrainian Elina Svitolina in the quarter-finals - the seventh seed came from a set down to beat Belinda Bencic.
• Romania's Sorana Cirstea is in the last eight at Roland Garros for the second time in her career, having previously done so 17 years ago.

A frustrated glare from Alexander Zverev tells us he's not happy with how he's started this match but the German second seed gets on the board with an ace.

That's better from Alexander Zverev as he works an opening before whipping a forehand winner across court.

A shake of the head follows another forehand into the net from Zverev before De Jong gets the better of an entertaining exchange which brings cheers from the crowd.

Deuce.

Ryan Harrison
Former American tennis player on BBC Radio 5 Sports Extra and BBC Sounds

Speaking on Saturday about the men's singles draw:

What we're saying is that Jannik Sinner and Carlos Alcaraz would have to be both healthy and winning in every Slam against every other player in the draw for Zverev to not be the favourite in a situation like now. I don't think this is going to be an isolated incident.

I think that there's going to be other Slams. It might not be this year. Maybe Sinner goes on a run at Wimbledon and the US Open, but then we get to next year. Maybe Sinner's injured and Alcaraz has a tough loss. Any time to me, for the foreseeable that Sinner or Alcaraz goes down, Zverev is the favourite.

Alexander Zverev has not settled yet with unforced errors cascading from the German's racquet.

De Jong gifts a double fault in an otherwise trouble-free hold to 15 for the unseeded Dutchman.

Another mistimed forehand into the net gives Jesper de Jong a second break point of the game - can he make this one count?

He can as Alexander Zverev drags a backhand wide.

Just the start De Jong would have wanted.

Alexander Zverev's forehand is out of tune early on and two errors give Jesper de Jong the first break point of the match.

A big serve from Zverev gets the German second seed out of trouble.

Deuce.

Jesper de Jong's drop shot is working nicely early on as Alexander Zverev can't reach the ball's fading bounce near the net.

The Dutchman gets off the mark as Zverev puts a forehand long.

Image source, Getty Images

Jesper de Jong has had an interesting route to the fourth round after getting into the draw as a lucky loser, before beating former French Open champion Stan Wawrinka in the first round.

The unseeded Dutchman has also turned 26 years old today - happy birthday Jesper!

He will be hoping he has a better birthday than Iga Swiatek, who exited at the hands of Marta Kostyuk earlier today on the day she turned 25.

Image source, Getty Images

Alexander Zverev has been long-tipped to one day win a Grand Slam and there's a growing feeling that the stars may be aligning for him in Paris.

With two-time defending champion Carlos Alcaraz missing through injury, Jannik Sinner was the odds-on favourite to win the tournament, before his shock exit to Juan Manuel Cerundolo on Thursday.

That was followed by 24-time Grand Slam winner Novak Djokovic's loss to Joao Fonseca on Friday.

Seeded second, Germany's Zverev is now the favourite to go all the way at Roland Garros. Will he ever get a better chance to win a Slam?