Pressure back on Alexander Zverev.

A 10th forehand error of the match from the second seed allows Rafael Jodar to edge in front but Zverev atones and levels at 15-15 with some lovely net play.

Zverev moves within a point of the hold at 40-15 with an ace but the hold will have to wait. Jodar meets a drop shot at the net and cuts an extremely acute angle with the return for 40-30.

Jodar can't get to deuce as his forehand falls short.

This is feeling like one of the games we had right at the start of this match when neither was prepared to give up ground.

Rafael Jodar turns the game on its head to earn advantage and gets the hold when Alexander Zverev's drop short falls short.

A huge hold.

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Alexander Zverev is definitely growing into this match.

The German hits another winner down the line for advantage and could be about to break again.

Trailing 30-0, Alexander Zverev gets two hands on the racquet and slides a backhand winner down the line to earn a foothold in this game.

Zverev closes in again at 40-30 when Jodar scuffs a forehand into the net.

And it's deuce when Jodar goes big from mid-court with a forehand slam and it doesn't have enough lift.

It's not job done yet for Alexander Zverev, though, as he needs to hold to stay in the set.

An ace is a pretty perfect way to start.

Zverev moves into a 40-0 lead when Rafael Jodar is at full stretch and finds the net with a backhand.

And there is the hold. The momentum might just be shifting.

Some nerves showing for Rafael Jodar?

The Spaniard has been so positive with the ball in hand but seems to have lost a little bit of confidence as he closes in on taking the set.

Jodar is too low with a forehand return and Alexander Zverev gets the set back on serve.

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A reminder that Rafael Jodar has dropped just one point across his last three service games.

He's unable to maintain that control as the end of this set is within touching distance as Alexander Zverev wins the first couple of points.

Make that three successive points for the German as Jodar hooks his forehand wide. Three break points for Zverev.

Alexander Zverev isn't panicking just yet. The German continues to struggle on his first serve but he's doing just enough in this game to stay in control.

Zverev slams an overhead volley to seal the hold to 15.

Rafael Jodar will serve for the set.

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Ryan Harrison
Former French Open men's doubles champion on BBC Radio 5 Sports Extra

Zverev is going to have to find some momentum because Jodar has made no mistakes.

Since a tense opening service game, Rafael Jodar has picked up successive holds to love.

Jodar leaps across the baseline to slam a winner down the line for 40-0. He's rising to the occasion.

But it won't be a hold to love if he gets over the line as Alexander Zverev executes a lovely drop shot. Jodar wraps up the hold to 15 when Zverev cuts into the net.

Zverev will serve to stay in the set.

Alexander Zverev saves the first.

There's a lengthy rally with neither prepared to back off for the second and Rafael Jodar gets it!

Jodar seals the break with a thundering forehand winner into the corner.

A huge moment in the opening set for the 19-year-old. He'll serve for a 5-2 lead.

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Rafael Jodar manoeuvres himself into a position at the net over the course of three returns and then slams a winner for 0-15.

Jodar gets to 0-30 but loses a little momentum when he's stretched at the baseline and returns into the net.

Alexander Zverev is very casual with a forehand to the corner and it strays well wide to hand over two break points.

On the court, Rafael Jodar gets his second successive hold to love.

The 19-year-old has found his groove.

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The roof is closed on Court Philippe Chatrier but there's a big downpour in Paris and it appears there are some gaps.

There are a few groans from the crowd as some spectators are getting soaked.

Ryan Harrison
Former French Open men's doubles champion on BBC Radio 5 Sports Extra

It is probably best for Jodar to play the drop shot.

Alexander Zverev is still taking a little time to find his rhythm on serve.

Trailing, 15-30 Zverev decides to turn up the aggression and strides up to the net where he hits a winner to level.

Zverev decides to stick with that approach and it works once more as he pulls 40-30 clear before wrapping up the hold.

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This is looking a lot more routine for Rafael Jodar.

The Spaniard steps up to the net and hits a volley winner for 40-0 before going on to hold to love.

That'll help to settle any potential nerves.

Rafael Jodar is getting the runaround at times. The teenager is sent end-to-end across the baseline before Alexander Zverev whips a forehand winner for advantage.

And the German goes on to get the hold.

We've had 18 minutes of play and just two games completed.

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Alexander Zverev hits his first ace of the match to get to advantage.

But he skews a simple return from the baseline - there might have been an awkward bounce off the clay - as they go back to deuce.

Rafael Jodar goes big from the baseline but misjudges his return and it crashes into the net.

And Alexander Zverev does a fine job of defending the second. The German forces Jodar into the corner and then emphatically volleys a winner on the next shot to get to deuce.