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)
*Fearnley 3-6 7-5 6-2 4-2 Cazaux
Jacob Fearnley's supporters chant his name, urging the world number 92 on as he looks to deliver another significant blow in this fourth set.
A solid service game from Arthur Cazaux keeps the Frenchman close behind.
Draper 6-7 (3-7) 6-3 3-6 2-4 Kokkinakis*
Just as the door looks wide open for Jack Draper, Thanasi Kokkinakis slams it in his face.
The British number one stands with his hands on his hips, barely believing that the Australian has found the line with that overhead.
Draper will get another crack, though. We go to deuce.
Draper 6-7 (3-7) 6-3 3-6 2-4 Kokkinakis*
Now then, is this a half chance for Jack Draper? Thanasi Kokkinakis finds the net twice to hand the Briton a 15-30 lead and a glimmer of hope.
Fearnley 3-6 7-5 6-2 4-1 Cazaux*
Abigail Johnson
Commentator on BBC Radio 5 Sports Extra and BBC Sounds
Jacob Fearnley is closing in, you wouldn't know it from the reactions of the Arthur Cazaux fans in the crowd, they are bowing down and waving French flags.
Fearnley 3-6 7-5 6-2 4-1 Cazaux*
An ace followed by a double fault for Jacob Fearnley, and that slip-up allows Arthur Cazaux in - the Frenchman putting away a superb forehand for 30-30.
Fearnley wins a key point with another ace before another big first serve takes him closer to his goal.
The scoreboard is looking very, very good indeed for the British player.
Image source, Getty ImagesDraper 6-7 (3-7) 6-3 3-6 3-4 Kokkinakis*
Jack Draper holds on. For now.
The 15th seed sends Thanaski Kokkinakis out wide and the Australian looks like he has hurt himself while sliding into the return, but he shakes it off and continues, with a couple of misses giving Draper the hold.
*Draper 6-7 (3-7) 6-3 3-6 2-4 Kokkinakis
Gigi Salmon
BBC Sport tennis commentator on BBC Radio 5 Live and BBC Sounds
Thanasi Kokkinakis is two holds of serve away from his first appearance in the third round of the Australian Open which would match his Grand Slam best - a third-round showing at Roland Garros.
*Fearnley 3-6 7-5 6-2 3-1 Cazaux
Jacob Fearnley strikes first in set four!
That feels like a big, big moment as the Briton continues his comeback from losing that opening set to stand three games away from a place in the third round on his Australian Open debut.
*Draper 6-7 (3-7) 6-3 3-6 2-4 Kokkinakis
Jack Draper is running out of time. He's got limited opportunities now to harm Thanasi Kokkinakis on serve and break back, while his own service game is looking fragile.
Dart 6-4 0-6 2-6 Vekic
Coco Vandeweghe
Former two-time Grand Slam semi-finalist on BBC Radio 5 Live and BBC Sounds
Sometimes you need that extra bit of help and I think those fans were exactly that for Donna Vekic to will her over the final hurdle.
Dart 6-4 0-6 2-6 Vekic
Abigail Johnson
Commentator on BBC Radio 5 Sports Extra and BBC Sounds
For the first time tonight and in over two hours it's a huge beaming smile from Donna Vekic who has been all sober faces and deep breathes, finally she shows elation.
Dart 6-4 0-6 2-6 Vekic
A phenomenal effort by lucky loser Harriet Dart, but the Briton's Australian Open comes to an end at the hands of 18th seed Donna Vekic.
Draper 6-7 (3-7) 6-3 3-6 2-3 Kokkinakis*
Better. Jack Draper trudges to his chair after a forceful forehand wraps up the hold, but once again that wasn't made easy for the Briton.
*Dart 6-4 0-6 2-5 Vekic
Donna Vekic can see the finish line. Harriet Dart may just have run out of steam.
The 18th seed will have three match points after a series of errors from Dart.
*Draper 6-7 (3-7) 6-3 3-6 1-3 Kokkinakis
Jack Draper looks a bit fed up.
Things aren't going to plan and he's got a real battle on his hands to claw his way back into this match. To make matters worse he's got most of the crowd in John Cain Arena cheering against him.
The British 15th seed finds himself 3-1 down as Thanasi Kokkinakis cruises to another hold.
*Dart 6-4 0-6 2-5 Vekic
Coco Vandeweghe
Former two-time Grand Slam semi-finalist on BBC Radio 5 Live and BBC Sounds
It's just been moments like this for Harriet Dart of indecisions, when it's windy and when the conditions are going against her, you're playing from behind, it's always about first choices, don't second guess yourself.
*Dart 6-4 0-6 2-5 Vekic
Harriet Dart can't make a backhand as the break point passes her by, and Donna Vekic makes her way to safety after coming through another couple of high-pressure points.
That could be the match. It's a real blow for Harriet Dart to get so close, but now she must serve to stay in the match.
*Fearnley 3-6 7-5 6-2 1-1 Cazaux
That lengthy break after the end of the third set seems to have helped Arthur Cazaux out.
The Frenchman looks refreshed as he forces Jacob Fearnley to fend off a break point in the opening game, while he rattles through a hold to love.
Dart 6-4 0-6 2-4 Vekic*
Shotttttt!
Harriet Dart unleashes a terrific backhand to get a break back point. That could be huge.
Nobody other than the players will really want this final set to come to a conclusion.
Dart 6-4 0-6 2-4 Vekic*
Nobody in the stands of court 14 is leaving this one early.
We're beyond 10pm and the skies above Melbourne Park have long been dark, but these two are still slogging it out as we approach two hours of play.
Oh no! Harriet Dart double-faults at a crucial moment to give Vekic 0-30, and she can't recover. It's advantage Vekic in the decider and Dart needs to produce something special now.
