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Cameron Norrie wins 6-3 3-6 7-6 (7-2) 6-3 against Constant Lestienne
Norrie match finishes at 01:28 local time in Melbourne after earlier rain delays
Coco Gauff beats Emma Raducanu 6-3 7-6 (7-4)
Rafael Nadal loses 6-4 6-4 7-5 to Mackenzie McDonald
Defending champion Nadal struggles with injury during defeat
Wins for Daniil Medvedev, world number one Iga Swiatek & Stefanos Tsitsipas
*Norrie 6-3 3-6 7-6 (7-2) 1-1 Lestienne
Lestienne lets slip a 30-0 lead but then delivers an emphatic forehand into the corner to go 40-30 up.
A slight shake of the racquet in celebration as another winner off the forehand earns him the hold.
Norrie 6-3 3-6 7-6 (7-2) 1-0 Lestienne*
Annabel Croft
Former British number one on BBC Radio 5 Sports Extra
Norrie needs that serve to be firing and he needs to ramp up the pressure. He is the one who needs to set the tone and the precedent in this match.
Still a few ball-toss problems for Norrie, though.
Norrie 6-3 3-6 7-6 (7-2) 1-0 Lestienne*
Lestienne is down but not out. With Norrie 40-30 up on serve, the Frenchman plays a peach of a backhand down the line to make this opening service game a tougher one than his British opponent will have been wanting.
From there, he skews a backhand well wide and then a forehand too long, handing the hold to Norrie.
*Norrie 6-3 3-6 7-6 (7-2) 0-0 Lestienne
After almost two and a half hours of play, both players have taken a comfort break prior to the start of the fourth set.
What will this set bring? Judging by the last one, who knows....
*Norrie 6-3 3-6 7-6 (7-2) Lestienne
Annabel Croft
Former British number one on BBC Radio 5 Sports Extra
Lestienne turning around and chuntering to his support team - and that shows you how stressed he is getting now.
*Norrie 6-3 3-6 7-6 (7-2) Lestienne
Norrie needs only one set point.
What a phenomenal turnaround from the British number one. Out of nowhere, he's dominating and Lestienne looks lost.
Norrie 6-3 3-6 6-6 (6-2) Lestienne*
A forehand error from Lestienne gifts Norrie four set points.
Norrie 6-3 3-6 6-6 (5-2) Lestienne*
A huge, huge couple of points for Cam Norrie as he goes 5-2 up in the tie-break.
His fortunes have truly changed.
*Norrie 6-3 3-6 6-6 (4-2) Lestienne
Annabel Croft
Former British number one on BBC Radio 5 Sports Extra
Norrie is starting to break the back of this tie-break. There is a little bit more doubt creeping into Lestienne. The walk has got a bit more weary as well.
*Norrie 6-3 3-6 6-6 (3-2) Lestienne
Lestienne nets off the backhand, and suddenly, it's Norrie in control. He's looking so much more disciplined than he did not that long ago.
Lestienne holds the next point but Norrie still holds the mini-break.
Norrie 6-3 3-6 6-6 (2-1) Lestienne*
The opening points of the tie-break go in the way of the server.
Cam Norrie leads 2-1.
Norrie 6-3 3-6 6-6 (0-0) Lestienne*
Russell Fuller
Tennis correspondent at Melbourne Park
This has been a bizarre set of tennis. It has been a bizarre match, but the next few minutes could be absolutely crucial.
Norrie 6-3 3-6 6-6 Lestienne*
It's as if Norrie has just remembered what he's meant to be doing.
A love hold to take this topsy-turvy third set to a tie-break.
*Norrie 6-3 3-6 5-6 Lestienne
Lestienne has just stopped Norrie in his tracks with a love hold. The Frenchman isn't going anywhere just yet.
Norrie 6-3 3-6 5-5 Lestienne*
Russell Fuller
Tennis correspondent at Melbourne Park
Norrie's serving has definitely improving in this set. But he needs to complete the job.
Norrie 6-3 3-6 5-5 Lestienne*
It's 12:28pm in Melbourne but Cameron Norrie is suddenly wide awake.
He sends down an ace to wrap up a hold to love and we're all level in this third set. Where on earth has this come from?!
*Norrie 6-3 3-6 4-5 Lestienne
Annabel Croft
Former British number one on BBC Radio 5 Sports Extra
Norrie is being a bit noisier - making his presence felt and maybe sending some psychological signals down the other end.
Things are getting a bit tense here for Lestienne.
*Norrie 6-3 3-6 4-5 Lestienne
Woah, has he found that something extra?
Norrie, showing much more fight, gets himself a break point at 40-30 up and then a fierce forehand gets him back in this set.
He's very happy with that.
Norrie 6-3 3-6 3-5 Lestienne*
Annabel Croft
Former British number one on BBC Radio 5 Sports Extra
Tactically Norrie is trying different things. He is trying to be aggressive, missing and then doubting himself.
He just doesn't know what to do.
My coach always said to me you play as well as you're allowed to play, and Lestienne is not allowing Norrie to play.
Norrie 6-3 3-6 3-5 Lestienne*
Norrie lost the first two points on his serve but clawed his way back to 40-30, only to net from close range to bring up deuce.
He seals the game but has to find something extra very, very quickly to stop Lestienne from taking this set.