Use play icon at top of page to listen to live radio commentary (UK only)
NOW: Andy Murray wins 4-6 6-7 (4-7) 7-6 (7-5) 6-3 7-5 against Thanasi Kokkinakis in Australian Open second round
Novak Djokovic beats Enzo Couacaud 6-1 6-7 (5-7) 6-2 6-0 to reach third round
Djokovic had medical timeout in second set as hamstring issue seems to be troubling him
GB's Dan Evans beats Jeremy Chardy in straight sets to reach third round
Men's second seed Casper Ruud and women's second seed Ons Jabeur are knocked out
Joe Salisbury, Neal Skupski and Jamie Murray among Britons to advance in doubles
*Murray 4-6 6-7 (4-7) 7-6 (7-5) 6-3 6-5 Kokkinakis
Pat Cash
Former Wimbledon champion on BBC Radio 5 Sports Extra
Just extraordinary stuff. Standard of tennis is faultless. It really is hard to believe.
*Murray 4-6 6-7 (4-7) 7-6 (7-5) 6-3 6-5 Kokkinakis
He's done it!
ANDY MURRAY WILL SERVE FOR THE MATCH NEXT.
Jonathan Jurejko
BBC Sport at Melbourne Park
It's 4am here and we've been watching this match for well over five hours.
And we still don't know who is going to win.
Mad sport.
Murray 4-6 6-7 (4-7) 7-6 (7-5) 6-3 5-5 Kokkinakis*
Superb work at the net from Murray.
This time. Surely.
Murray 4-6 6-7 (4-7) 7-6 (7-5) 6-3 5-5 Kokkinakis*
Nope.
Murray is caught going backwards as he tries to hit a forehand and it sails wide as a result.
On we go.
Murray 4-6 6-7 (4-7) 7-6 (7-5) 6-3 5-5 Kokkinakis*
Net chord says no to Kokkinakis' forehand. A third chance for Murray to go ahead.
Murray 4-6 6-7 (4-7) 7-6 (7-5) 6-3 5-5 Kokkinakis*
Ace!
Kokkinakis is pulling these out of the bag when it matters most.
Murray 4-6 6-7 (4-7) 7-6 (7-5) 6-3 5-5 Kokkinakis*
Another stellar serve from Kokkinakis, another break point saved.
Murray 4-6 6-7 (4-7) 7-6 (7-5) 6-3 5-5 Kokkinakis*
Here we go!
Kokkinakis misses and Murray has two chances to break. If he gets one of these, he will serve for the match next.
#bbctennis
David: Murray's sleep cycle will be so confused
Murray 4-6 6-7 (4-7) 7-6 (7-5) 6-3 5-5 Kokkinakis*
Amongst all this drama, a little graphic from our social media team to lighten the mood.
Murray has been playing for five hours and 34 minutes and it is now 3.55am in Melbourne. Brutal.
Image source, Getty ImagesMurray 4-6 6-7 (4-7) 7-6 (7-5) 6-3 5-5 Kokkinakis*
It's another close call!
Murray is darting all over the place and Kokkinakis tries for a lob, but it lands just out.
Murray stays in it.
*Murray 4-6 6-7 (4-7) 7-6 (7-5) 6-3 4-5 Kokkinakis
Murray's serve gets him out of the hole. Kokkinakis' backhand return lands out and it's game point to the Brit.
*Murray 4-6 6-7 (4-7) 7-6 (7-5) 6-3 4-5 Kokkinakis
No, no, no. Kokkinakis gets on the front foot again, jumps in the air and slams down a forehand winner. That's deuce.
*Murray 4-6 6-7 (4-7) 7-6 (7-5) 6-3 4-5 Kokkinakis
Another solid serve from Murray and that's 40-30. The dedicated fans get what they came for.
Image source, Getty Images*Murray 4-6 6-7 (4-7) 7-6 (7-5) 6-3 4-5 Kokkinakis
Too much on it this time from Kokkinakis. The ball sails out and it's 30-30.
*Murray 4-6 6-7 (4-7) 7-6 (7-5) 6-3 4-5 Kokkinakis
Uh oh.
Kokkinakis brings out the big guns and is 30-15 up on Murray's serve - two points away from victory.
*Murray 4-6 6-7 (4-7) 7-6 (7-5) 6-3 4-5 Kokkinakis
The net cord has been on Andy Murray's side for much of this match, but this time it finally hits one for Thanasi Kokkinakis.
The ball drops off it onto Murray's side of the court and brings up 15-15 on Murray's serve.
*Murray 4-6 6-7 (4-7) 7-6 (7-5) 6-3 4-5 Kokkinakis
Pat Cash
Former Wimbledon champion on BBC Radio 5 Sports Extra
All of a sudden the pressure is on Andy, and the players are so tired at this stage I don't know if the nerves are coming back into the match.
You keep rolling on and you are just too exhausted to feel the nerves.
Tweet at #bbctennis
Andrew: ok Andy, I believe you. The hip is ok.