Anastasia Potapova's deep groundstrokes are continuing to cause Coco Gauff problems.

Three break points for the 28th seed.

With her fourth break point, Coco Gauff makes a dent in her second-set deficit.

It's a huge moment for the American and at the other end of the court, her opponent is starting to show signs of frustration.

It must be tricky for both players with the sun and shade split right down the middle of Court Philippe-Chatrier, but it doesn't really excuse Anastasia Potapova's latest groundstroke error, sending a forehand long.

She yells a few words in between points.

Excellent composure from Anastasia Potapova, nailing her first serve out wide and watching Coco Gauff's backhand return float long.

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A second double-fault of the game from Anastasia Potapova. Huge point coming up.

Just the 21 shots in that baseline slugfest and it's Anastasia Potapova who comes out on top with a deep forehand returned into the net.

Once again, her hard work is undone by an unforced error.

A third loose stroke from Coco Gauff gives Anastasia Potapova advantage but then... a double fault. Dear, oh dear.

Fortunately for Anastasia Potapova, Coco Gauff can't capitalise.

Just when you think Anastasia Potapova has got a stranglehold on the set, she opens the door for her opponent.

Two unforced errors are followed by a backhand into the net as she's caught in no man's land on the approach.

Oh, that is brilliant! There's a bit of everything in the opening point of the fourth game.

Both players have a crack at a smash before retreating again to the baseline. Then, Anastasia Potapova deploys the drop shot and although Coco Gauff chases it down, she's unable to do anything with the subsequent smash.

15-0.

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With her second break point, Anastasia Potapova earns the double-break and let's out a "come on!".

For the third time in the game, she profits from a Coco Gauff error, this time a backhand finding the net.

Momentum has swung. Anastasia Potapova wallops a forehand winner before gleefully accepting a couple of sloppy errors from Coco Gauff.

She's got three more break points.

A stroke of fortune for Coco Gauff as Anastasia Potapova's smash clips the net chord and sits up beautifully for a forehand pass - 15-30.

Potapova lets out a roar of disgust but keeps her composure to hold to 30 with a forehand winner and a couple of good first serves.

Anastasia Potapova overpowers Coco Gauff with a backhand. She's stopped the rot!

What a combination from Anastasia Potapova! After grinding back and forth, she hammers a backhand deep into the corner on the American's backhand, sends a forehand in the same direction with Coco Gauff unbalanced and comes into the net to bury the volley.

Anastasia Potapova wastes the first two with backhand errors before Coco Gauff dominates a 17-shot baseline exchange with her forehand.

Where has this come from? After losing four consecutive matches to surrender the first set, Anastasia Potapova has not one, not two, but three break points.

She broke in the first game of the match. Can she do so again?

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It's a third double fault of the match from Anastasia Potapova.

Coco Gauff converts her first set point to clinch the first set 6-4.

She could have gone 5-2 down but saved two break points and has now won four consecutive games.

What a turnaround this is from the American. She's quickly up to a drop-shot from Anastasia Potapova and nails a backhand pass to bring up three set points.

My compliments to the DJ on Court Philippe-Chatrier - we've had The Weather Girls, a bit of Diana Ross, simply marvellous.

"Come on Coco, keep digging," comes the encouragement from Gauff's box.