Four Britons in second-round Australian Open action on day four
Jack Draper comes from behind to beat Thanasi Kokkinakis in five-set thriller
Jacob Fearnley claims fine win over Arthur Cazaux to reach third round
Harriet Dart edged out by 18th seed Donna Vekic in three sets
Jodie Burrage loses 6-3 7-5 to third seed Coco Gauff
Click audio icon to listen to live commentary on BBC Radio 5 Sports Extra (UK only)
Jonathan Jurejko
BBC Sport in Melbourne
Not for the first time tonight, Jack Draper is baffled by the lack of call by the automated line-calling system.
Hands are back on hips as he asks the chair umpire what's going on.
*Draper 6-7 (3-7) 6-3 3-3 Kokkinakis
The double fault from Jack Draper is just a brief blip en route to another service hold.
*Dart 6-4 0-3 Vekic
Abigail Johnson
Commentator on BBC Radio 5 Sports Extra and BBC Sounds
Harriet Dart is pushing but Donna Vekic is starting to hit through the ball now, she has a lethal strike when she's got the ball in the middle of her racquet.
That's why she's had the best results of her career over the last 12 months, it's just a task right now to find those shots on a regular basis.
*Dart 6-4 0-3 Vekic
Donna Vekic swivels into a fist pump and lets out a big roar as she shuts down the second of those two break points against her.
It's been really up and down at times from the Croat, but she manages to work her way out of a tight spot with four straight points to hold for a three-game lead.
*Fearnley 3-6 7-5 0-0 Cazaux
The first set points goes missing, but Jacob Fearnley gets the next one.
The British world number 92 holds up a clenched fist as Arthur Cazaux nets to level this second-round tie. We're in for a cracker here.
Image source, Getty ImagesFearnley 3-6 6-5 Cazaux*
A double fault and a miss from Arthur Cazaux opens up the door for Jacob Fearnley, who then sends down a forehand winner.
A huge chance for the Briton. Three set points.
Dart 6-4 0-2 Vekic*
Harriet Dart fires back with a forehand winner for 0-30 as she goes after an immediate response - and she will have the opportunity to do just that.
A booming groundstroke into the corner draws a miss from Donna Vekic for two break points.
Dart 6-4 0-2 Vekic*
Coco Vandeweghe
Former two-time Grand Slam semi-finalist on BBC Radio 5 Live and BBC Sounds
It's all about giving yourself a bit of forgiveness out here on these windy and blustery days. I think it just took Donna Vekic that quick toilet break to collect herself and give herself a little bit of forgiveness.
Dart 6-4 0-2 Vekic*
A big game from Donna Vekic, and how she needed that.
The 18th seed breaks Harriet Dart to love with a powerful forehand and there are the first signs that the momentum has begun to shift here with that one-sided game.
*Draper 6-7 (3-7) 6-3 2-3 Kokkinakis
Thanasi Kokkinakis may be grimacing and moaning about that shoulder, but it isn't doing any harm to that serve.
Jack Draper can't make a dent on his opponent's service game and the Australian lands another ace to seal the love hold.
On we go.
Fearnley 3-6 6-5 Cazaux
Jacob Fearnley does what he needs to do and gets through his service game, handing the pressure back over the Arthur Cazaux.
The Frenchman will have to hold to stay in the set and force the tie-break.
Image source, Getty ImagesDraper 6-7 (3-7) 6-3 2-2 Kokkinakis*
Gigi Salmon
BBC Sport tennis commentator on BBC Radio 5 Live and BBC Sounds
Jack Draper is looking to really drill down now and get the advantage over Thanasi Kokkinakis and his sort of one arm that he's playing with.
The body language from Kokkinakis is a little bit dejected.
Draper 6-7 (3-7) 6-3 2-2 Kokkinakis*
Let's keep an eye on how that shoulder holds up for Thanasi Kokkinakis holds up.
He's looking rather dejected and is shaking his head towards his team as Jack Draper breezes through his service game.
Image source, Getty Images*Dart 6-4 0-1 Vekic
Harriet Dart can't force a break point here and sends a backhand long as Donna Vekic takes the first game of the new set. The lucky loser is really pushing the world number 19 here.
Jonathan Jurejko
BBC Sport in Melbourne
Now Thanasi Kokkinakis decides it is time to have some treatment on that troublesome right shoulder.
Think he's wanted another therapeutic rub and more painkilling gel for pretty much all of the past two hours, frankly.
But, according to Grand Slam rules, a player is only allowed one medical time-out for "each distinct treatable medical condition".
*Fearnley 3-6 5-5 Cazaux
The French section of fans are loving the fight Arthur Cazaux is showing right now.
He's backed up the break to level the set against Jacob Fearnley.
Image source, Getty Images*Draper 6-7 (3-7) 6-3 1-2 Kokkinakis
Mark Woodforde
17-time Grand Slam doubles champion on BBC Radio 5 Sports Extra and BBC Sounds
I'm a bit surprised that there isn't any tape keeping that shoulder [of Thanasi Kokkinakis] in place. The trainer is out there and a lot of motioning going towards the coaching team on the other side of the court.
Dart 6-4 0-0 Vekic*
Donna Vekic will serve first in set two as last year's Wimbledon semi-finalist looks to kickstart her fightback in this match.
The crowd are giving plenty of love to the efforts of lucky loser Harriet Dart, however, and the Briton earns applause as she slams a two-handed backhand down the line to stay in touch at 40-30.
Another winner brings Dart to deuce.
*Draper 6-7 (3-7) 6-3 1-2 Kokkinakis
Thanasi Kokkinakis has called for the physio and he's having a medical timeout, with a grimace stretched across his face.
It looks like that problematic right shoulder is the issue for the Australian.
*Draper 6-7 (3-7) 6-3 1-2 Kokkinakis
Ohhhh. Jack Draper looked like he had that point in the bag to bring up advantage, but the ball just doesn't want to trickle over to Thanasi Kokkinakis' side of the net.
The Australian doesn't offer a second chance to the Briton and he calmly closes out the game.
