Last GB singles hope Cameron Norrie wins 6-1 7-6 (7-3) 4-6 7-6 (7-5) against Emilio Nava
Norrie to face third seed Alexander Zverev in third round
Emma Raducanu loses 7-6 (7-3) 6-2 to Anastasia Potapova in second round
Carlos Alcaraz beats Yannick Hanfmann 7-6 (7-4) 6-3 6-2 as bid for career Grand Slam continues
British qualifier Arthur Fery beaten 7-6 (7-4) 6-1 6-3 by Tomas Martin Etcheverry
Sakkari 0-6 4-3 Andreeva*
This match has turned on its head. All the momentum is with Maria Sakkari now after she lost the first set 6-0.
She's cut down her unforced errors and finding the court with some lovely winners.
*Norrie 6-1 7-6 (7-3) 4-6 0-0 Nava
Image source, Getty ImagesEmilio Nava has finally got it!
The American seals the third set on court seven with some top-class serving, including three aces to take his total to 12 for this second-round match.
He fights back from 15-40 down to force a fourth set. Cameron Norrie will serve first.
Norrie 6-1 7-6 (7-3) 4-5 Nava*
Oh hello!
Cameron Norrie has powered his way to two break points at 15-40.
The pressure is well and truly on Emilio Nava here.
Norrie 6-1 7-6 (7-3) 4-5 Nava*
Daniel Kiernan
Former British tennis player on BBC Radio 5 Sports Extra 2
Image source, Getty ImagesWe have the same situation as the second set but it feels different.
[In set two] it never felt that Nava was in the position to go through the open door - but the way he is carrying himself and has played in the last few games, it feels like he is the favourite to take this to a fourth set.
Norrie 6-1 7-6 (7-3) 4-5 Nava*
Cameron Norrie is keen to extend this set though.
He is known for his five-set thrillers, but of course he would prefer to close this out as soon as possible.
He serves and rallies through to hold to 15. He is finding a lot of joy when he manages to pin Emilio Nava to the baseline.
*Norrie 6-1 7-6 (7-3) 3-5 Nava
Image source, ReutersEmilio Nava moves to within one game of taking this second-round match into a fourth set.
The American has been here before though, so who knows what to expect from here on out!
He will be happy with the fight he is showing though, with the third qualifying round being his previous tournament best.
Sakkari 0-6 3-2 Andreeva*
Now then! After losing seven games on the trot, Maria Sakkari wins three in a row and breaks back against Mirra Andreeva.
This match looked like it was heading one way and one way only, but there's suddenly a glimmer of hope left for Sakkari.
Her body language has completely changed and she's looking pumped up and confident now.
Zverev 6-3 Muller
Image source, Getty ImagesAlexander Zverev has secured the first set as he seeks a place in the third round.
The German third seed won four games in a row to take the opener against Frenchman Alexandre Muller 6-3, clinching his first set point after earning back-to-back breaks of serve.
A reminder that the winner of this match will await Cameron Norrie or Emilio Nava.
Norrie 6-1 7-6 (7-3) 3-4 Nava*
Another edgy service game but Cameron Norrie gets an important service hold.
The British number two is forced all the way to deuce but Emilio Nava commits another unforced error on his forehand.
I did say the American would need to gee himself up and I reckon just about everyone at Melbourne Park will be able to hear his shouts at the minute.
Sakkari 0-6 1-2 Andreeva*
The crowd are behind Maria Sakkari, willing her on. They want her to get back into this match.
And finally she does! The Greek player is on the scoreboard and makes sure she'll avoid a double bagel at least.
*Sakkari 0-6 0-3 Andreeva
Image source, ReutersThings are getting to Maria Sakkari. She's furious with herself for attempting a down-the-line winner rather than going for an easier shot and making sure she finds the court.
"Just play free" her coach is telling her as Mirra Andreeva wraps up the hold.
*Norrie 6-1 7-6 (7-3) 2-4 Nava
You can hear what this means to Emilio Nava.
He is appearing in his first Australian Open main draw, and he is keen to not pass the opportunity up.
With an ace thrown in there, the 24-year-old races through his service game to hold to love.
Norrie 6-1 7-6 (7-3) 2-3 Nava*
Image source, Getty ImagesAn absolute lifeline for Emilio Nava!
The American is the first to pull away in this third set after forcing Cameron Norrie's service game to deuce.
He had two chances to break and took it on the second after the Brit tried to squeeze a backhand past him at the net.
Game on.
Sakkari 0-6 0-1 Andreeva*
Mirra Andreeva's streak goes on. That's seven games in a row now.
Marria Sakkari is out of sorts and she takes her frustration out on the court, whacking down her racquet in anger.
*Norrie 6-1 7-6 (7-3) 2-2 Nava
These service games are getting edgier and edgier.
Emilio Nava is forced all the way to deuce but manages to hold on thanks to a mishit volley from Cameron Norrie.
We are still on serve in this third set.
*Sakkari 0-6 0-0 Andreeva
Image source, EPAA sublime first set for Mirra Andreeva, who grabs a bagel against Maria Sakkari.
If she continues on like this, it would be a huge statement to other top 10 seeds about her title credentials in Melbourne.
Norrie 6-1 7-6 (7-3) 2-1 Nava*
We are still on serve in this third set.
Cameron Norrie holds to 15 with a little helping hand from the net cord, which helps along a backhand winner.
Over to you, Emilio Nava.
*Norrie 6-1 7-6 (7-3) 1-1 Nava
That'll do for Emilio Nava.
The unseeded American hits a forehand winner down the court and then forces back-to-back mistakes from Cameron Norrie to hold to love.
Image source, Getty ImagesElsewhere, in the men's draw, Kazakh 10th seed Alexander Bublik has just taken a two-set lead against Marton Fucsovics 7-5 6-4.
German third seed Alexander Zverev is under way in his second-round match against Frenchman Alexandre Muller, with that one on serve in the first set.
Home hope Alex de Minaur, seeded sixth in Melbourne, is also in the early stages of his meeting with against Serb Hamad Medjedovic.
Norrie 6-1 7-6 (7-3) 1-0 Nava*
Another strong service game from Cameron Norrie. He holds after being forced to deuce.
The Brit is serving with plenty of power and hitting his spots at the minute.
His first-serve percentage is sitting at 66% which is good but slightly lower than I expected.
