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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 4-3 Humbert
More headshaking from Nick Kyrgios.
Again at the electronic line call, but this time even when it went in his favour.
The Aussie seems to indicate he thought a serve from Humbert should have been down on the sheet as an ace.
Nevertheless, the French 29th seed holds to 30 and stays within one of his opponent.
Halep 4-6 6-4 Tomljanovic
No mistake from Simona Halep. The second seed takes this one to a deciding set.
*Halep 4-6 5-4 Tomljanovic
A clump of frame from Simona Halep and it seems to wrong-foot Ajla Tomljanovic, who knocks a forehand long.
Set points, Halep.
*Halep 4-6 5-4 Tomljanovic
Oh, what a rally! Halep draws Tomljanovic in and the Australian just picks it up, but Halep is there to pop it back over the net beyond her opponent - 27 shots in all, wonderful stuff. 30-0.
*Kyrgios 5-7 3-2 Humbert
More highs and lows in Nick Kyrgios' on-court mood than a ride at Blackpool Pleasure Beach.
Shoulders slump a little as Humbert goes on to hold, even though the Aussie is still a break up.
That knee injury looks to be playing on his mind.
*Halep 4-6 5-4 Tomljanovic
Punchy stuff, as Tomljanovic fires her way to 40-0 before Halep responds with a sizzling down-the-line backhand winner. The second seed is grinding, but catches the tape at 40-30 and Tomljanovic holds.
Halep 4-6 5-3 Tomljanovic*
Good from the Australian, forcing Simona Halep deep and then slapping down a volley into the space vacated by the Romanian. Ajla Tomljanovic follows it up with a fiery ace. 30-0.
Halep 4-6 5-3 Tomljanovic*
Halep rattles to the hold and Tomljanovic will now have to serve to stay in the second set.
*Kyrgios 5-7 2-1 Humbert
Ahhh isn't it great to have an atmosphere on a tennis court! The Melbourne fans go wild in a half-full John Cain Arena as Nick Kyrgios breaks early in the second set.
Odd game that. Kyrgios seemed to be struggling with a long-standing knee injury, Humbert maybe sucked in by the rope-a-dope.
Not that Kyrgios is milking it. The problem has hampered him for a while, including at last week's Murray River Open.
*Halep 4-6 4-3 Tomljanovic
Simona Halep's trouble so far is she hasn't been able to back up her breaks, though a snapped string does for her in the opening point of her service game.
New racquet in hand, the second seed gets Ajla Tomljanovic shuttling across court and then wrong-foots the home player with a sweeping forehand. 15-15.
*Halep 4-6 4-3 Tomljanovic
Halep takes a deep breath and stares at the line, pondering whether that Tomljanovic groundstroke was long... it wasn't. But the Romanian snaffles the break on her second opportunity as she seizes on a short ball to thunder it beyond the Australian with a forehand winner.
Her third break of the set.
Image source, Getty ImagesHalep 4-6 3-3 Tomljanovic*
Tomljanovic pops a forehand long and it puts Halep within touching distance of a break at 0-30.
The Australian hustles and bustles her way back to 15-30 but then leaks a backhand wide.
Two break points.
Kyrgios 5-7 1-1 Humbert*
While Nick Kyrgios regularly gesticulates and shakes his head before launching his serves, Ugo Humbert remains as cool as the Salford weather.
The 22-year-old Frenchman looks like he would still get ID'd buying booze in the supermarket. But he is playing here with maturity and composure.
A couple of thumping winners help him take Kyrgios to deuce but he can't grab a look at a break point.
Halep 4-6 3-3 Tomljanovic*
Back-to-back holds of serve, which has been a rare sight in this one.
"Aussie, Aussie, Aussie..." is the cheer from the Melbourne locals.
*Halep 4-6 2-3 Tomljanovic
And from there, Tomljanovic rattles to the hold. The world number 72 senses an opportunity...
Halep 4-6 2-2 Tomljanovic*
Simona Halep ups the intensity from the baseline and forces Ajla Tomljanovic into the tramlines, but a punchy serve from the Australian levels it up at 30-30.
Stick with us - Alex Bysouth will take you through second seed Simona Halep's match with Ajla Tomljanovic, with Halep in a sticky situation...
Image source, ReutersHalep 4-6 2-2 Tomljanovic*
Simona Halep has broken in the second set against Ajla Tomljanovic, who took the opener, but the Australian has a chance to break back immediately here, and does!
Halep not impressed.
Kyrgios 5-7 Humbert
Uh oh. The set has gone south for Nick Kyrgios.
Ugo Humbert earns a couple of set points after a loose service game from the Aussie, sticking away a winner on the first opportunity after a willowy drop-shot comes his way.
Kyrgios is furious with himself. His racquet pays the price and will go to the recycling bin.
Image source, gettyOsaka 6-2 6-3 Garcia
Naomi Osaka gets Ons Jabeur next, who is another potentially tricky opponent for the third seed.