Image source, Rex Features

A dominant serve for Raonic. He wins the point.

Milos Raonic hands the mini-break straight back as he dumps a makeable volley into the net.

Even-stevens

Andy Murray serves for the first point of the tie break. He scoops himself across court but his forehand goes just out. So close.

Tim Longland: Was hoping for a relaxing morning listening to the tennis. HOW WRONG I WAS (pulls hair out).

Russell Fuller
BBC tennis correspondent in Melbourne

"Both players deserve a tie-break because the serving from both has been excellent under pressure."

Milos Raonic pings a backhand winner down the line and it is tie-break time.

Hold on to your hats.

Milos Raonic drifts a forehand long under pressure.

Andy Murray over-cooks a lob.

Thirty-all. Neck and neck. No margin for error...

Milos Raonic clumps down a double fault on the first point of the game.

His serving action is spluttering. Could its owner choke once more?

Pat Cash
Former Wimbledon champion on Radio 5 live sports extra

"Raonic was constantly under pressure and Murray was making some good returns.

"It's about getting half a chance and seeing if someone will crack."

Dave Foot: Pensions Life Time Allowance calculations don't make for a very exciting Friday, except for the tennis... 

Charlie Fennell: More nervous about the Murray game than my driving test later on.

Image source, Getty Images

Phew. Phone Steve McQueen (you might struggle on reflection). That remake of the Great Escape is in the can.

Murray slips off the hook. And now Raonic must serve to stay in the set at 6-5 down.

He failed to do so in the second set finale.

Andy Murray pulls himself back from the brink.

Milos Raonic looked to have a play on the ball, but could not summon up the skill and guts to hit a winner.

Andy Murray plonks a groundstroke wide.

Break point Raonic.

Defcon one Murray fans.

Andy Murray twangs the net as he attempts a backhand punch down the line.

The strings get a slap of punishment for that.

We are to deuce.

Andy Murray backed into a corner as he offers up 0-30 to Milos Raonic for the second game running.

How are those nerves?

Oh my. Murray's are rock-solid as a delicious drop-shot dies out of reach to take him back level at 30-30.

On we go...

Image source, Getty Images

Milos Raonic is playing with the accuracy and nervelessness of a supercomputer.

A lovely one-two punch - serve out wide, forehand blast down the line - helps him coast to 40-0.

The Canadian nestles into that big cushion of a lead as he stretches the strings with a full-blooded second serve. That is almost on the baseline.

But a ace - with the kick of a mule - finds the mark on the next point.

Emily Marquand: Researching superconducting power cables and listening to the tennis makes for an exciting Friday.

MeF: Here I am again in Kraków airport nervously tracking an Andy Murray match on #bbctennis, external and trying not to look like a lunatic #pluscachange, external

Now, this is a nerve-jangler.

Andy Murray duffs a nothing-much forehand into the top of the net to hand Milos Raonic 0-30. Sticky.

The Scots calls on the serve gods and they answer his prayers with a pinpoint delivery out wide that Raonic can only pat into the net.

Murray levels to 30-30 and is then drawn into some baseline trench warfare, as he batters back and forth for supremacy. There is the error from Raonic! Into the net and 40-30.

Fortune favours the brave and Murray surges to the net on the next point and gets a little lucky as Raonic pings a shot straight at him. Murray volleys away and is out of danger.

For now.

Pat Cash
Former Wimbledon champion on Radio 5 live sports extra

"Raonic loves this sort of tennis. He's thinking: 'Just get me to the tie-breaker and I'll whack a couple of winners'."

Another hold to love and, as we head into the pointy end of things, this is tightrope tennis.

One slip on serve and, the way that the other guy is teeing off, there seems there will be no way back.