Dimitrov beats Kyrgios 7-6 7-6 4-6 7-6 in fourth round
Bulgarian faces GB's Kyle Edmund in last eight
Edmund beat Andreas Seppi 6-7 7-5 6-2 6-3
Briton into first Grand Slam quarter-final
Nadal beats Schwartzman 6-3 6-7 6-3 6-3
Wozniacki through to women's last eight
Simon Briggs
Daily Telegraph tennis correspondent on BBC Radio
He's managed to do a leaping air punch but pulled out of whooping the crowd up. It's not in his nature but these victories must make him feel he can show a bit of swagger now.
Other players are looking at him and thinking 'this is one guy I do not want to play against'.
Seppi 7-6 (7-4) 5-7 2-6 3-6 Edmund
Kyle Edmund - you're a Grand Slam quarter-finalist.
The win is sealed as Seppi nets and Edmund is cool as you like before the handshake.
Then the emotion comes out. A big running punch of the air from the Briton. What a moment for him.
Seppi 7-6 (7-4) 5-7 2-6 3-5 Edmund*
Seppi hits back with a winner of his own but that's outstanding! What an angle from Kyle Edmund.
Two match points...
Seppi 7-6 (7-4) 5-7 2-6 3-5 Edmund*
Winner. 15-0.
Ace. 30-0.
Edmund is on the brink.
Seppi 7-6 (7-4) 5-7 2-6 3-5 Edmund*
This time Kyle Edmund breaks! He's almost there!
The 23-year-old from Yorkshire is about to serve for a place in his first Grand Slam quarter-final.
Simon Briggs
Daily Telegraph tennis correspondent on BBC Radio
I've written three times this week that Kyle has come of age. I'm not sure I can write that intro again!
He's had a different challenge in each match and the one theme to come through is that he's been behind and turned it around every time.
*Seppi 7-6 (7-4) 5-7 2-6 3-4 Edmund
It could be!
Seppi gets one point back but a 61st (SIXTY ONE!) winner off the Edmund racket bring up two break points.
*Seppi 7-6 (7-4) 5-7 2-6 3-4 Edmund
It's the Edmund fans you can hear again in the stands. The Briton runs and runs to battle to 0-30 in Seppi's service game.
A third opening in this set. Is this the one he takes?
*Seppi 7-6 (7-4) 5-7 2-6 3-4 Edmund
One nonchalant winner flies off Seppi's racket but Edmund wins the game with a heavy strike of his own. Another important hold and Edmund has a look of complete concentration on his face as he strides straight past Seppi to his chair..
Nadal 6-3 6-7 (4-7) 6-3 6-3 Schwartzman
That's it! Eventually Rafael Nadal breaks down Diego Schwartzman to win 6-3 6-7 (4-7) 6-3 6-3.
But it was undoubtedly the number one seed's toughest test at this Australian Open so far.
The Spaniard takes a cracker on Rod Laver Arena in three hours 51 minutes.
He'll face Croatian sixth seed Marin Cilic in the quarter-finals.
Seppi 7-6 (7-4) 5-7 2-6 3-3 Edmund*
That foot fault call has fired Seppi up. He fights off the break point for Edmund and then serves an ace to win the game. A clench of the fist from the Italian. This could be a difficult next game for Edmund with his opponent pumped.
*Seppi 7-6 (7-4) 5-7 2-6 2-3 Edmund
"Seppi, Seppi, Seppi," chants one section of the crowd as the Italian denies Edmund.
Back to deuce.
First served missed by Seppi. Now a foot fault! Controversy. Seppi isn't happy. He drops his racket to the floor and starts complaining to the umpire. "Never in my life," he says.
His protests don't matter. Edmund has another break point.
*Seppi 7-6 (7-4) 5-7 2-6 2-3 Edmund
Without the pressure of needing to hold Edmund can now free his arms and he seems to have perked up again. Another big forehand wins a point and then he stretches to force Seppi to play one more ball and the Italian misses. Break point to Edmund.
Simon Briggs
Daily Telegraph tennis correspondent on BBC Radio
I don't think Edmund has the strength in his legs that he'd like. He has stopped running around his forehand.
I don't know whether that's because he doesn't think it's working or because he's trying to save his legs.
*Seppi 7-6 (7-4) 5-7 2-6 2-3 Edmund
That's a really big hold for Kyle Edmund. It looked like his adrenaline had dropped a little with the finish line in sight but he holds on with a backhand winner to seal it.
Seppi had his chance. He missed a crosscourt backhand at 30-30 with Edmund on the run.
The Italians are still chanting in the crowd. They still believe and can sense a first sign of tiredness in Edmund.
Nadal 6-3 6-7 (4-7) 6-3 5-3 Schwartzman
Rafael Nadal has just staved off two break points to hold serve and move within a game of the quarter-finals.
The Spaniard leads 5-3 in the fourth set against Diego Schwartzman, who just won't lie down for the number one seed.
Simon Briggs
Daily Telegraph tennis correspondent on BBC Radio
Seppi looks demoralised. He doesn't have the arsenal and he's not moving as well as he did in the first set.
His best bet is to hope that Edmund hits the wall because Edmund has played two five-set matches to get here and might tire.
Image source, ReutersSeppi 7-6 (7-4) 5-7 2-6 2-2 Edmund*
Even Edmund's gambles are paying off now. Seppi has a high ball inside the service box to put away but Edmund guesses right and smacks the ball back at the Italian who goes wide with the volley.
Perhaps the shoulder massage has helped Seppi. He looks to have a little bit more behind his serve in this game and that bails him out. We're still level in the fourth set.
Piers Newbery
BBC Sport at Melbourne Park
After a slow start, the last hour or so of tennis has demonstrated why Edmund is starting to be considered a contender. He has the 'weapon' that all tennis-watchers look out for in potential stars - a forehand that could crack cement - but the foundations of his game are good all round.
It's now about cutting out the lapses in these longer matches, and a remarkable turnaround from 23 errors in the first set to six in the second and five in the third has left Seppi with little to work from.
Image source, EPA*Seppi 7-6 (7-4) 5-7 2-6 1-2 Edmund
Andreas Seppi is getting the same treatment Kyle Edmund asked for at 6-5 in the first set, a massage to the right shoulder.
It worked for Edmund. He has upped his game beyond belief from that point.