Day two of the Australian Open
LIVE: British number one Jack Draper 4-6 6-3 3-6 Mariano Navone
From 08:00 GMT: Novak Djokovic v Nishesh Basavareddy
GB's Jacob Fearnley takes on Nick Kyrgios, Carlos Alcaraz also in action
Britain's Jodie Burrage claims emotional win, Harriet Dart through
Jannik Sinner begins title defence with victory over Nicolas Jarry
Click audio icon for live commentary on BBC Radio 5 Live's Tennis Breakfast (UK only)
*Draper 4-6 6-3 3-6 3-3 Navone
Jack Draper looks perplexed as Mariano Navone takes the hold. The Briton thought the Argentine's forehand had gone out and stands at the back of the court staring at the screen to make sure.
Another hold on the board for Navone.
Draper 4-6 6-3 3-6 3-2 Navone*
A brilliant get from Mariano Navone at the net but it's not enough as Jack Draper sends a forehand whizzing past him for deuce.
But for all that work he hands the Argentine another opportunity which he again has to save with a big forehand.
He eventually strings a couple of points together to take the hold. Draper clinging on here.
*Draper 4-6 6-3 3-6 2-2 Navone
Daniela Hantuchova
Former world number five on BBC Radio 5 Sports Extra
Jack is struggling big time. He is just trying to hang in this service game, but so many of the choices he is making are because he just wants to finish the points off quickly.
It feels like there isn't much energy left in his tank.
*Draper 4-6 6-3 3-6 2-2 Navone
This feels like a must-win game for Jack Draper but in a flash he finds himself at 0-30.
He rallies with a couple of winners for 30-30 but then hands Mariano Novane a break point with a daft drop shot.
*Draper 4-6 6-3 3-6 2-2 Navone
A tricky hold for Mariano Navone. Three deuces later, the Argentine finally takes the game on his fourth game point.
He didn't have to face a break point but it was a difficult game nonetheless.
Pegula 6-3 6-0 Joint
Image source, Getty ImagesJessica Pegula booked her spot in the Australian Open second round just a few moments ago, after seeing off Maya Joint in straight sets.
The world number seven comes into the competition after reaching the final of the WTA Adelaide International last week.
The American wrote the word 'LA' with a love heart on the camera lens as she left John Cain Arena, showing her support to those affected by the ongoing wildfires in Los Angeles.
Draper 4-6 6-3 3-6 2-1 Navone*
To me, to you. Are we going to get another break of serve here?
A really good cross-court forehand from Jack Draper leaves Mariano Navone skidding across court for deuce. A brilliant drop shot from the Argentine gives him game point but Draper comes back with another forehand winner.
Draper 4-6 6-3 3-6 2-1 Navone*
Jack Draper slices an attempted drop shot into the net and gifts the break back.
Huge frustration for the British number one as he heads to his chair for the change of ends.
*Draper 4-6 6-3 3-6 2-0 Navone
There's nothing Jack Draper can do about that, as Mariano Navone slams a cross-court forehand out of reach for 15-30.
And now the Argentine will have two opportunities to secure an immediate break back.
*Draper 4-6 6-3 3-6 2-0 Navone
Jack Draper makes the early breakthrough in set four!
Just as he did in the second set, the British number one responds to his latest setback to hit the front in this must-win set.
Image source, EPADraper 4-6 6-3 3-6 1-0 Navone*
Jack Draper gets up and running on Mariano Navone's serve with another blistering forehand, before drawing an error from the Argentine to move a couple of points up.
Navone makes a backhand winner to get on the board but a miss gives Draper a look at two break points.
Draper 4-6 6-3 3-6 1-0 Navone*
Jack Draper looked on course for a comfortable opening hold of serve at 40-15, but this match is not proving to be so simple.
Mariano Navone battles back and gets two shots at a break of serve, but Draper sees off the second with a forehand winner before turning the game back in his favour.
That is a really important hold under pressure.
*Draper 4-6 6-3 3-6 0-0 Navone
Jack Draper will get to serve first in set four as he looks to take this to a decider.
This is going to be a real test of his fitness now with more than two-and-a-half hours on the clock.
Image source, Getty Images*Draper 4-6 6-3 3-6 0-0 Navone
Jack Draper goes for the kill on Mariano Navone's third set point and comes up short.
It's advantage to the Argentine once again and Draper is going to have to go the distance if he's to make the second round.
Draper 4-6 6-3 3-5 Navone*
The crowd don't want this game to end! Jack Draper has a third set point as the pair continue to exchange points, but once again Mariano Navone denies him the lifeline.
BBC Radio 5 Live Sports Extra
Tennis Breakfast is live from Melbourne Park.
Gigi Salmon and Russell Fuller are joined by former world number five Daniela Hantuchova, 17-time Grand Slam doubles championMark Woodfordeand former player Ryan Harrison.
Listen to the latest commentary and updates at the top of this page and on BBC Radio 5 Sports Extra.
Draper 4-6 6-3 3-5 Navone*
Jack Draper is rising to the occasion here!
The Briton is playing some of his best stuff in these big moments and goes from set points down to break point up.
Mariano Navone denies him, but Draper won't go away and a terrific cross-court backhand gives him another opportunity.
Draper 4-6 6-3 3-5 Navone*
That's the way to shut down a set point!
Jack Draper takes charge of the point and nonchalantly smacks a forehand precisely into the opposite corner.
One more to save... and he does so by running on to a volley at the net.
Image source, Getty ImagesDraper 4-6 6-3 3-5 Navone*
Can Jack Draper keep this third set alive? It could be crucial given his previous struggles with the warm conditions.
The Briton attacks a forehand but goes long, handing Mariano Navone two set points.
Draper 4-6 6-3 3-5 Navone*
Jack Draper gives himself a chance.
He's made to work all the way, of course, but the Briton holds serve and will look to frustrate Mariano Navone.