Postpublished at 05:49 Greenwich Mean Time 23 January 2018
Dominic Inglot
British doubles player on Radio 5 live at Melbourne Park
Dimitrov is shaking his head, he's shocked by what's happening with himself.
Nadal retires injured in final set - Cilic wins 3-6 6-3 6-7 6-2 2-0
GB's Edmund beats Dimitrov 6-4 3-6 6-3 6-4 to reach semi-finals
Edmund in last four of a Grand Slam for first time - will play Nadal or Cilic
Wozniacki v Suarez Navarro to follow
Mertens stuns Svitolina 6-4 6-0 to reach last four
Caroline Chapman
Dominic Inglot
British doubles player on Radio 5 live at Melbourne Park
Dimitrov is shaking his head, he's shocked by what's happening with himself.
Dimitrov 4-6 6-3 3-5 Edmund*
Here we go - Kyle Edmund, serving to take a 2-1 lead in his first Slam quarter-final.
Dimitrov 4-6 6-3 3-5 Edmund*
Serve out wide from Grigor Dimitrov, and Kyle Edmund nets. One down, one to go.
Double fault from Dimitrov! Again! Of all the times... Edmund has the break, and will serve for the set!
Dimitrov 4-6 6-3 3-4 Edmund*
Down the line goes Kyle Edmund, taking advantage of some dodgy serving from Grigor Dimitrov, before Dimitrov darts to the net and hustles the error out of the Brit.
That's overworked from Dimitrov, though! That'll be two break points to Edmund.
*Dimitrov 4-6 6-3 3-4 Edmund
Kyle Edmund is struggling to stay in a rally, stretched to his limit behind the baseline, but it's Grigor Dimitrov who blinks first as his backhand volley fizzes out of bounds.
Another big first serve, and Edmund holds to love, too. We're staying on serve.
Dimitrov 4-6 6-3 3-3 Edmund*
Kyle Edmund is limping a touch. Or that might just be how he walks, I'm not sure. Tennis players do stroll around extra carefully.
There's a brief pause in play as a bird comes floating down to inspect Grigor Dimitrov's serve. The Bulgarian blasts a forehand winner on his way to a love hold.
*Dimitrov 4-6 6-3 2-3 Edmund
Piers Newbery
BBC Sport at Melbourne Park
There has clearly been a tactical decision made by Team Edmund to approach the net far more than is usual for the hard-hitting baseliner, and he already has 17 winners up at the net. Tim Henman will be impressed in the front row.
However, when the crunch moment came on break point, he failed to follow in some bludgeoning forehands and Dimitrov wrestled the point away from him.
*Dimitrov 4-6 6-3 2-3 Edmund
Punishing back-to-back serves from Kyle Edmund, and Grigor Dimitrov's replies go spinning over the tramlines.
A speedy service game, and the Briton holds with another ace.
Dimitrov 4-6 6-3 2-2 Edmund*
"Come on!" yells Grigor Dimitrov as he fires an ace past Kyle Edmund.
A furious swipe of a forehand from Edmund - but it finds the net! Dimitrov will hold.
Dimitrov 4-6 6-3 1-2 Edmund*
Long rally, Grigor Dimitrov dragged this way and that, but Kyle Edmund can't find that killer blow.
A delicious slice from Dimitrov, and it's Edmund who nets.
Dimitrov 4-6 6-3 1-2 Edmund*
Kyle Edmund's been very strong up at the net today - first the backhand volley wrong-foots Dimitrov, and then he has quick hands to dink the forehand over. Coach Rosengren approves.
Oh! Edmund throws everything but the kitchen sink at a forehand winner - here's break point...
*Dimitrov 4-6 6-3 1-2 Edmund
A good first serve from Kyle Edmund, and he follows it with a forehand that whizzes cross court and beats Dimitrov.
Edmund holds, but not without some trouble.
*Dimitrov 4-6 6-3 1-1 Edmund
An outrageous return from Grigor Dimitov!
A nibble off the net cord looks to have beaten him but he comes darting forward, sliding and thrusting his racquet forward to flick over a volley that Edmund can't respond to.
Edmund cracks down a fiery ace in response for 40-30, but a loopy backhand from the Brit goes out of bounds.
Russell Fuller
BBC tennis correspondent at Melbourne Park
If Edmund can find his 'A' game, he is capable of winning this match - or at least this set.
Dimitrov 4-6 6-3 1-1 Edmund*
The misses are coming a little too quickly off Edmund's racquet at the minute.
He claws himself back in as Grigor Dimitov falters on his forehand, but any hope of an opening is ended with an ace from the Bulgarian.
* denotes next server
*Dimitrov 4-6 6-3 0-1 Edmund
There have been 22 forehand errors from Kyle Edmund so far.
It's such a big weapon for him, but I wonder if he's trying to hit it that bit too hard.
Dominic Inglot
British doubles player on Radio 5 live at Melbourne Park
That is a real big confidence booster when you were down in that game. This is the time where Kyle needs to step in here. Mentally he needs to be really focused and disciplined here.
*Dimitrov 4-6 6-3 0-1 Edmund
Good, solid serving from Kyle Edmund.
Twice, Grigor Dimitrov's backhand reply float long, and Edmund holds.
Russell Fuller
BBC tennis correspondent at Melbourne Park
This is probably the biggest set of Edmund's life. It is critical to his chances in the match.
*Dimitrov 4-6 6-3 0-0 Edmund
Alrighty then.
An emphatic start from Kyle Edmund is cancelled out by back-to-back unforced errors. The final one is the worst, an easy forehand going long to hand Dimitrov a break point.
A pacey first serve saves the Brit.