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Now: Nick Kyrgios 5-7 6-4 3-6 7-6 (7-2) 6-4 Ugo Humbert
Simona Halep fights back to beat Ajla Tomljanovic 4-6 6-4 7-5
Novak Djokovic beats Frances Tiafoe 6-3 6-7 (3-7) 7-6 (7-2) 6-3 to reach third round
Serena Williams & Naomi Osaka through but Bianca Andreescu & Petra Kvitova knocked out
Dominic Thiem wins in straight sets, Stan Wawrinka loses in five
Day three from the Australian Open at Melbourne Park
Kyrgios 5-7 6-4 3-6 6-5 Humbert*
Humbert was serving for the match a few minutes ago. Now he is serving to stop it going to a fifth set.
An Aussie version of 'Seven Nation Army' is hummed by the home crowd. And Kyrgios is loving it.
Kyrgios 5-7 6-4 3-6 6-5 Humbert*
Kyrgios cracks straight on with his next service game and is lapping up the attention.
This is a vintage JCA atmosphere.
Humbert looks shellshocked as he now trails in the fourth set.
*Kyrgios 5-7 6-4 3-6 5-5 Humbert
Can you believe it?! Where Nick Kyrgios is concerned, yes.
A kid holding a sign saying 'Kyrgios MVP' jumps around the stands like it is Christmas morning and he's got an XBox from Santa.
This lad sums up the feelings of all Kyrgios fans right now.
Kyrgios 5-7 6-4 3-6 4-5 Humbert*
Oh! Scenes!! Kyrgios knocks a sizzling backhand past Humbert and forces deuce. He just laughs.
The Aussie fans are up on the feet. And then he hits another!! Sensational.
Break point to Kyrgios...
Kyrgios 5-7 6-4 3-6 4-5 Humbert*
Humbert hits a first serve into the net and the crowd cheer. That's not tennis.
But then Humbert gains his revenge by forcing Kyrgios into the net. Maybe Kyrgios forced himself into that.
Either way, it is a second match point...
Kyrgios 5-7 6-4 3-6 4-5 Humbert*
Saved! Kyrgios goes after Humbert, pushing him back and making him blink. Deuce...
Kyrgios 5-7 6-4 3-6 4-5 Humbert*
Now the door is firmly shut. Kyrgios sends a backhand wide and it is match point...
Kyrgios 5-7 6-4 3-6 4-5 Humbert*
What a response from Humbert. A perfectly placed serve pulls him level at 30-30, Kyrgios twiddles his racquet in frustration.
Kyrgios 5-7 6-4 3-6 4-5 Humbert*
Starting with an ace is what the tennis doctor prescribed... but then an error into the net is greeted by huge roars from the Aussies.
At 15-15, Kyrgios hangs into a baseline duel and then sees Humbert crack a forehand long.
The door is slightly ajar... 15-30.
Kyrgios 5-7 6-4 3-6 4-5 Humbert*
Humbert, who reached the last 16 at Wimbledon in 2019, will serve to go into the third round of a Slam for only the second time in his burgeoning career.
Here we go...
Kyrgios 5-7 6-4 3-6 4-5 Humbert*
But it won't be this game. Kyrgios whips through a service hold like he is playing in fast forward. A 206kpm ace down the middle puts the pressure back on Humbert.
The French 29th seed will serve for the match...
*Kyrgios 5-7 6-4 3-6 3-5 Humbert
That could be the match. Right here. Unnerving stuff from Humbert, who whacks down a second serve ace to hold.
That rocky path has been navigated smoothly. Kyrgios is one game away from going out of the Australian Open...
Kyrgios 5-7 6-4 3-6 3-4 Humbert*
Jinxed him. Humbert's eyes widen when he sees the court open up but pushes a backhand agonising wide.
Third break point for Kyrgios... saved with another ace! Unbelievable.
Kyrgios 5-7 6-4 3-6 3-4 Humbert*
Oh my word! What a second serve. He's saved the second with the precision of a heart surgeon.
Kyrgios 5-7 6-4 3-6 3-4 Humbert*
Make that 15-40! And two break points for Kyrgios.
After being pummelled by Kyrgios, Humbert skews a forehand wide.
And then... the Frenchman returns to the freezer and pulls out an ice-cold ace.
One saved...
Kyrgios 5-7 6-4 3-6 3-4 Humbert*
Kyrgios is responding the better, pushing Humbert back behind the baseline and forcing him long. That's 15-30...
Kyrgios 5-7 6-4 3-6 3-4 Humbert*
Did someone here suggest earlier that Humbert lacked, erm, on-court personality? Not me, honest.
With the crowd geeing up Kyrgios with some noise, the Frenchman cups his ear and encourages them more.
Nerveless. Let's see if that continues in his next service game...
Kyrgios 5-7 6-4 3-6 3-4 Humbert*
Wind him up and watch him go. A 177kph ace down the middle puts Kyrgios 40-0 ahead, then a thumping return can't be returned by Humbert.
Over to you monsieur...
*Kyrgios 5-7 6-4 3-6 2-4 Humbert
No faffing about from Kyrgios. Balls are quickly rolled to his side of the court and away he goes..
Image source, getty*Kyrgios 5-7 6-4 3-6 2-4 Humbert
Ugo Humbert only has to win three more service games to reach the third round. Only, huh?
Can he chalk one of them off here? Kyrgios refocuses as he leads 0-15, only for a shank to help switch it back in the Frenchman's favour.
The crowd raise the volume again as Kyrgios levels at 30-30, but a loose backhand into the tramlines puts Humbert within touching distance.
Another error into the net and Humbert is a step closer...