Lovely stuff from Dan Evans, showing off his subtle side with a sprint to the tape and delicate volleyed winner. Federico Delbonis responds with a thumping forehand, and then pushes the Brit deep to force an error.

Evans take a deep breath, gives the Argentine the stare, and sizzles down a second serve ace.

Match point...

Barty is owning Court One. She's gliding across the court like a swan on Lake Coniston.

And those slices?!!!

If you've got some smoked salmon (other fish are available) to carve up then give it to the Aussie.

John Inverdale
BBC Sport at Wimbledon

Federico Delbonis has never won a game on grass in his life and it doesn't look like that's going to change - Dan Evans gets his break of serve.

There was some really positive hitting from Evans in that game and now he just needs to serve it out.

Dan Evans grinds to 0-30 again on the Federico Delbonis serve, and then leaps into a forehand winner that skips off the line for 15-40 - Delbonis will challenge, he's not impressed. But that's kissed the chalk and Evans has two break points.

And he takes it! The British number three will serve for the match.

Image source, Getty Images

A great start for reigning women's champion Angelique Kerber as she has broken the serve of fellow German Tatjana Maria in only the third game of the opening set on Centre Court.

Barty brings up two break points with a great approach-and-volley at the net.

The Chinese world number 43 gifts her the first as she goes wide with a backhand from the back.

Harriet Dart gets what could be a crucial break in the deciding set. The British number three edges into a 4-3 lead, but now has to defend three break back points. And she can't back up the break, how frustrating for the 22-year-old - Christina McHale makes it 4-4 to suck the oomph out of Dart's charge towards the second round.

John Inverdale
BBC Sport at Wimbledon

Dan Evans escapes another nervy game to hold.

Now he needs to banish all those bad thoughts. He's leading, on-serve, and he's in the driver's seat.

Image source, Getty Images

Two huge break points saved by Dan Evans. A little fist bump to celebrate, and then a meaty smash to move him towards another big hold. Having to do it the hard way in this third set, the world number 61. Federico Delbonis isn't leaving SW19 without a fight.

Zheng Saisai, known for her great eyewear, is rocking a cracking set of shades on Court One - so much so that Barty appears to be dazzled by them over the opening tussles.

30-30.

Make that deuce as the Aussie launches one over the boundary rope.

She holds as Zheng goes wide with a double-handed backhand.

James Ward's clash with Nikoloz Basilashvili will go to a fourth set. The 32-year-old took the opening two sets but it's the Georgian 18th seed who hits back.

And Ward has just been broken in the first game of the fourth, tense over on court 17...

Wimbledon's top seed, world number one and new French Open champion Ash Barty is about to get her SW19 challenge under way on Court One against China's Zheng Saisai.

Two sets? Or might Barty struggle under the weight of expectation?

Reigning women's champion Angelique Kerber starts her 2019 campaign in the first match on Centre Court today.

She beat Serena Williams 6-3 6-3 in the 2018 final, is seeded fifth and takes on fellow German Tatjana Maria, a 31-year-old who is ranked 65th in the world and has never made it past the third round here.

You can watch this one here.

Image source, .

"Come on now," Dan Evans tells himself after letting slip a mini break. Still looking for a breakthrough in the third, the Brit...

John Inverdale
BBC Sport at Wimbledon

We always talk about Dan Evans as a great net player, good at the overheads and solid on serve.

But it was his serve that got him through there.

Image source, Reuters

Uh oh. Jordan Thompson is losing his cool, the mustachioed Aussie slams his racquet towards the turf and the Nick Kyrgios mind games/nonchalance appears to be getting to him.

Kyrgios has sauntered up and down his usual spectrum of bizarre to brilliant today, but the winner in the clip above was rather tasty...

John Inverdale
BBC Sport at Wimbledon

After 17 minutes of agonising to-and-fro, from Dan Evans' point of view, there's too much fro in the end.

If he could have got over the line he would have been very nearly there.

Now, he has to reset, he's two sets up and on serve.

Image source, PA Media

An extraordinary 17-minute game finally comes to a close with Federico Delbonis fending off Dan Evans and keeping the third set on serve.

Harriet Dart gets the break early in the third set, and then finds herself defending three break back points for Christina McHale. The American needs just one... anyone's guess to which way this one is heading.

Federico Delbonis has saved five break points in this game, eight in this set.

A rearguard action that is keeping his head above water. Just.

Here comes another break point for Evans...