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
High excitement in the Melbourne Park press room as some furry visitors drop by. Here's 5 live's Gigi Salmon and Mozart the koala bear. He’s a big Kyle Edmund fan, apparently...
Image source, BBC SportBelow is Maverick. He’s edging towards Dimitrov...
Image source, BBC SportAnd here's Gigi and Cat Archer kissing Sebastian the wombat. He plans to sleep through the tennis...
Image source, BBC SportDimitrov v Edmund
Grigor Dimitrov ended up leaping to Kyle Edmund's aid when these two last crossed paths.
Facing off in the last 16 of the Brisbane International, the pair were locked at 4-4 in the deciding set before Edmund fell awkwardly.
The Briton twisted his ankle and Dimitrov, in a scene fit for any action movie, ran and vaulted the net to check on his opponent.
After treatment, Edmund carried on but lost the match 6-3 6-7 (3-7) 6-4.
Image source, EPAGrigor Dimitrov, last year's ATP Finals champion, brushed past qualifier Dennis Novak in the opening round in Melbourne.
A three hour, 25 minute tussle with Mackenzie McDonald was followed up by a win over world number 32 Andrey Rublev.
Nick Kyrgios, who beat Dimitrov on his way to the title in Brisbane earlier this month, awaited the Buglarian in a fascinating tie.
In a match that swung wildly at times, it was Dimitrov who previaled, beating the home-town favourite in four sets.
Image source, Getty Images
BBC Radio 5 live
There's commentary available of Kyle Edmund's quarter-final match today on 5 live.
You can listen in using the link at the top of the page.
Dimitrov v Edmund
Kyle Edmund started this tournament by claiming the biggest win of his career - a five-set victory over 11th seed Kevin Anderson.
A straight-set victory over Denis Istomin - who knocked Novak Djokovic out last year - was followed by a win over three and a half hours in 40C against Nikoloz Basilashvili.
Finally, an impressive fight back against Andreas Seppi secured him a place in his first Grand Slam quarter-final.
There's more on Edmund's incredible run here.
Image source, ReutersDimitrov v Edmund
A big cheer for Kyle Edmund as he makes his way out onto Rod Laver Arena.
He's followed by Grigor Dimitrov. They're both decked out in a lurid shade of pink.
Dimitrov v Edmund
Kyle Edmund was joined in practice the other day by former Australian Open champion Thomas Johansson.
Johnasson claimed the title in Melbourne in 2002 having never progressed beyond the quarter-finals of any of his 24 previous Grand Slams.
A good omen...?
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Dimitrov v Edmund
Piers Newbery
BBC Sport at Melbourne Park
Image source, BBC SportIt's a beautiful afternoon at Melbourne Park, around 23C and less breezy than in recent days.
Kyle Edmund will be making his debut on Rod Laver Arena in the relative calm of the afternoon, as opposed to the feverish night-session atmosphere that Grigor Dimitrov knows well after several big matches there in the past, most recently just two days ago.
Edmund enjoyed lots of British support in his first four matches on the outer courts, but it's likely to be a bit less frenetic this afternoon - at least at the outset.
Well...
Britain's Kyle Edmund continues his bid to reach his first Grand Slam semi-final as he takes on third seed Grigor Dimitrov next.
Rafael Nadal headlines the night session on Rod Laver Arena against Croatia's Marin Cilic, before Caroline Wozniacki plays Carla Suarez Navarro.
Image source, Getty ImagesDimitrov v Edmund
Kyle Edmund has already achieved his best run at a Grand Slam.
Can he go one step further and reach the semi-finals?
Image source, Getty Images