Coco Gauff has really upped the ante, and is moving Mayar Sherif all over the court.

The American is a real problem-solver - and she looks like she might have found the key to beating the talented Egyptian.

Gauff breaks again and will now serve for a place in the third round.

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A forehand that whizzes by Elsa Jacquemot's feet is greeted by a triumphant cry from Aryna Sabalenka.

A mistimed drop shot gifts Jacquemot a chance to get back into the game, but Sabalenka snatches it away before holding with a deft winner at the net.

The quietness in the crowd suggests their belief that Jacquemot can deliver a shock on Court Philippe-Chatrier is fading away.

Finally we have a hold of serve in this second set.

Coco Gauff appears to have stepped up the aggression levels, and it pays off.

She's put some daylight between herself and Mayar Sherif in this second set.

Some excellent hitting from Aryna Sabalenka opens up a smash opportunity and the world number one obliges.

Sabalenka then opens up break point by coming into the net to put a forehand away.

Some more powerful work coming into the net sees Sabalenka get the break, and she celebrates with a modest fist pump.

Katie Boulter was set to be on court six today, but her second-round match will now be on court 13 because one of the matches scheduled for that court did not take place because of a walkover.

That means the British player will be in action much sooner than we thought - probably in the next 20-30 minutes.

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There have been some fabulous rallies in this match.

Coco Gauff manages to get on top again, firing the ball down the line at the end of another entertaining exchange to go two break points up.

Mayar Sherif is not taking a step back and saves both with some aggressive shot-making.

But then the Egyptian nets, and it's a fifth break in a row in the second set.

That's got to be frustrating for Elsa Jacquemot as she can't take advantage of Aryna Sabalenka's slip-ups.

After saving three break points, Sabalenka holds at deuce with another forehand winner.

Aryna Sabalenka might be a set up but she is far from comfortable out there with unforced errors creeping back into her game.

The world number one gifts three break points to Elsa Jacquemot with a wide shot, before tossing a tennis ball up in the air out of frustration.

Sabalenka saves all three with some strong first serves, and we head to deuce.

Once again, Coco Gauff lets her opponent back in the match and goes 0-40 down.

She saves two of the break points but can't cope with a bit of Mayar Sherif magic on the final one.

Yet another break. That's eight in the past nine games in this second-round match.

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Coco Gauff breaks Mayar Sherif again to re-establish her lead in the second set.

The American is coping well with everything Sherif is throwing at her - which includes moon-balling forehands and cute drop shots.

She's a set and a break up but she needs to hold onto her own serve, which has looked vulnerable.

Despite the crowd's loud backing of Elsa Jacquemot, it feels like Aryna Sabalenka is finally getting the upper hand now.

A backhand winner gives her a 0-30 lead, before coming out on top in an exchange at the net to bring up three set points.

A mistimed drop shot from Elsa Jacquemot then gives Sabalenka the set. A sigh of relief from the top seed and world number one.

Aryna Sabalenka crushes a forehand into the corner for her 21st winner of the set. Not bad for someone who's been lacking momentum so far.

Sabalenka's first serve gets her to game point before another big forehand winner.

Over to you, Elsa Jacquemot.

Mayar Sherif was on the cusp of the top 30 a couple of years back, and she's certainly not overawed by the occasion.

The Egyptian carves out two break points but Coco Gauff shows her trademark defence, making her opponent play another shot each time, and finally forcing the errors.

However, the American can't serve a third break point, which Sherif clinches with a volley winner.

A deafening roar from the crowd greets a forehand winner down the line from Elsa Jacquemot, who responds with a roaring fist pump.

She's feeding off the energy from the crowd and secures the hold with a drop shot in front of a despairing Aryna Sabalenka.

Aryna Sabalenka sniffs an opportunity in a crucial game here and gets into a 0-30 lead, but Elsa Jacquemot fights back to level with a deep forehand winner.

The pair trade points and the game heads to deuce.

A huge forehand brings up set point for Sabalenka but she can't make it count as she goes into the net.

The second set starts where the first left off - with a long rally. Mayar Sherif wins it and pumps her fist.

But it's Coco Gauff who takes the initiative in the game, rushing her opponent into errors.

It's a fourth break for the American.

At 4-4 and 30-30 in the first set this could be a big moment and it's Aryna Sabalenka who comes through with a big first serve.

The world number one lets out a triumphant cry, before sealing the hold with an ace down the middle.

Against a home favourite on Court Philippe-Chatrier, Sabalenka was up against it a bit there but delivered when it mattered.

More frustrated grimaces from Aryna Sabalenka as Elsa Jacquemot opens up a 30-0 lead and the Belarusian can do nothing as the Frenchwoman outplays her at the net.

Jacquemot then buoys the crowd as she raises her arms asking for more, before going on to hold - much to the Paris fans' delight.

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Coco Gauff throws in a serve and volley to earn set point, and then clinches the first set with an ace.

Leon Smith
GB Davis Cup captain on BBC Radio 5 Sports Extra and BBC Sounds

I think Gauff has been a bit loose in some of the serving games but I think she will switch on.

Physically and emotionally, that has been a tough hour and Sherif is starting to look like she is feeling it a bit.