Oh Grigor Dimitrov, stop it.

One hand, reactionary punch down the line. Nick Kyrgios can't adjust his feet quickly enough to meet it.

The Australian pulls back to 30-15, and then dinks a forehand slice from the baseline just over the tape.

He holds.

Fourth set then. But this one could be going the distance...

Grigor Dimitrov powers his way to 40-0, and then coaxes a smart forehand out of Nick Kyrgios' reach to take an early lead.

Leon Smith
GB Davis Cup captain on BBC Radio 5 live sports extra

Kyrgios found a way to raise himself and is serving great, hitting lots of winners and this has to go to five sets now.

That's the 25th ace of the match for Nick Kyrgios, and with it the third set.

So it's Nick Kyrgios serving for the set.

He waits for the crowd to settle, composes himself on the baseline and then thunders down an ace.

A looping forehand follows, having pushed Grigor Dimitrov wide, and another ace.

Three set points.

Grigor Dimitrov fends off the set point and makes his way to advantage.

Nick Kyrgios goes long and wide with a wild crosscourt forehand.

Dimitrov holds.

Image source, EPA

Dimitrov responds with an ace, and a little "come on" after clawing it back to 30-30.

Kyrgios stands up to the next one, waltzes towards the net and nonchalantly meets the power of Dimitrov with a volleyed winner.

Set point.

Leon Smith
GB Davis Cup captain on BBC Radio 5 live sports extra

Kyrgios is seeing the ball like a beach ball and is just swinging away with such power.

Some of his shots are not normal.

Grigor Dimitrov finds himself serving to stay in the set, but it's Nick Kyrgios who takes the first point.

And he goes 0-30 up, thundering a forehand winner beyond the Bulgarian before he'd even reached the floor after his serve.

Two hours, 20 minutes into this last 16 meeting. How you holding up?

Nick Kyrgios still has it in him to dig deep into his bag of tricks and pull out the deftest of forehand slices, leaving Grigor Dimitrov skidding across the Melbourne Park surface in vain.

A clinical hold to love from the Australian.

Magic, that just flirted with line from Grigor Dimitrov - kissing the white paint right on the outside off his forehand, and it's a big hold for the Bulgarian.

Grigor Dimitrov, stepping into a Nick Kyrgios return, hammers a flailing forehand beyond the Australian with aplomb.

Power and finesse from the third seed, but he can't slide around a backhand enough to pop it across the net, and Kyrgios backs that up with a low, fizzing forehand winner - 30-30.

Nick Kyrgios cruises into a 30-0 lead on his service game. He's oozing confidence now.

Dimitrov can't deal with the Australian's powerful serve, but a loose volley from below the net gives the Bulgarian a chance.

Dimitrov can only find the net with a backhand. Kyrgios holds.

Image source, AFP

Leon Smith
GB Davis Cup captain on BBC Radio 5 live sports extra

Kyrgios brings unpredictability and that gets into your mind. It also raises the crowd and Dimitrov will have to deal with that.

BBC Radio 5 live sports extra

Just a little heads up that you can now listen to live commentary of this match on BBC Radio 5 live sports extra as well as online.

That's because England have just beaten Australia in the third ODI to clinch the series.

Grigor Dimitrov goes wide, Nick Kyrgios breaks!

That's a cracking one-handed backhand winner down the line from Dimitrov. Kyrgios cannot get near it.

Dimitrov's approach catches the net on the next point though, and that gives Kyrgios time to pick his spot. He does.

Two break points.

Image source, EPA

Thunderous from the right hand of Nick Kyrgios, driving a forehand back at Grigor Dimitrov before the Bulgarian could blink.

Is this the break point chance? Dimitrov goes long and it's 0-30.

Serve and volley tactics from Nick Kyrgios, and he comes up trumps as Grigor Dimitrov clips the net.

Kyrgios takes to volleying from midcourt next time around, but the Bulgarian whistles a forehand winner across his path and off the line to level at 15-15.

A couple of ferocious serves and Kyrgios goes 40-15 up. And that's the game.

"If you're here for five sets, clap your hands..." chants a section of the crowd, to a small flurry of applause.

Grigor Dimitrov scrambles into a 30-0 lead on his service game, before Nick Kyrgios flunks a return short of the net.

Dimitrov frames a backhand deep, but Kyrgios can only rattle the tape in response.