It might only be delaying the inevitable but a hold is needed for Sonay Kartal to avoid handing Coco Gauff the chance to serve for the match.

But Gauff has break point as Kartal's forehand strays long.

Gauff attempts a drop shot, it's sliced back from Kartal and Gauff's lob shot goes too deep. Deuce.

This feels like a big game for Emma Raducanu, having let that chance to go a double-break up slip.

The Briton starts with an ace. Pressure? What pressure?

"Come on!" cries Maria Sakkari who gets a smash of her own spot on to recover from 0-40 down to hold.

The world number nine is still in this first set.

Coco Gauff was made to work in the first set by Sonay Kartal but showed her class to eventually get over the line.

Laura Robson
Former British number one on BBC Radio 5 Live and BBC Sounds

Coco seems to have relaxed a little. She’s going for her shots, she’s playing freely and she’s going through the middle third to put Kartal under pressure.

I think we’re starting to see Kartal making a few more errors now and it’s not easy to keep playing at the level she was playing at and if she was able to keep that up, she would be ranked a lot higher.

Coco Gauff lays down a statement of intent as she aces her first serve. 15-0.

Surprisingly, that's followed back a double fault. 15-15.

Kartal faces a 118mph serve and can only block it from hitting her body.

Gauff holds and is running away with this.

Johanna Konta
Former British number one on BBC TV

We've seen so few errors off the Emma Raducanu side. She really is playing exceptionally well so far.

Groans on Centre. Emma Raducanu has the break on a plate but fires an overhead smash into the net.

Emma Raducanu goes long. 30-40.

Maria Sakkari saves the first with a volley at the net. 15-40.

It's just starting to unravel slightly now for Sonay Kartal as she struggles to match the intent and aggression that coming in her direction.

Kartal gets her angles wrong and Gauff gets a double break.

There's a feeling that this match might have just started to swing heavily in Gauff's favour.

The American has won five games in a row.

Image source, Getty Images

Jonathan Jurejko
BBC Sport at Wimbledon

The Centre Court ticket-holders who have popped for a Pimm's might want to think about getting back quick sharp.

Raducanu hits a fine forehand return to set up three break points. 0-40.

Now then, another opening appears as Maria Sakkari slices into the net to fall to 0-30.

Image source, Reuters

Emma Raducanu adds another hold to her collection, with two powerful serves that Maria Sakkari struggles to return.

Ashleigh Barty
Three-time Grand Slam champion on BBC TV

Emma Raducanu is confident, at ease as well and playing within herself.

Charlotte Coates
BBC Sport at Wimbledon

Tennis under a roof is special. Incredible atmosphere in here and we’re only half full.

Some brilliant winners on Centre now as both players trade great crosscourt backhand finishers.

A Maria Sakkari error then takes us to 30-15 on Emma Raducanu's serve.

Coco Gauff has just hit a serve at 120mph - that's the fastest she's hit all day.

Gauff is really starting to race through these service games and takes this one to 15.

Ashleigh Barty
Three-time Grand Slam champion on BBC TV

Maria Sakkari is a great competitor. I do feel like sometimes she's her own worst enemy out there. I think she can get quite down on herself at times and she can get quite emotional on court.

Again, she has continued to mature as you do on tour and she's definitely come a long way.