Image source, Getty Images

Tomorrow's action begins with Andy Murray taking on Kei Nishikori in the afternoon match from 14:00 GMT before Marin Cilic goes up against Stan Wawrinka from 20:00 GMT.

See you there yeah?

There were just two points in the match when the numbers were finally crunched after two hours plus of action - 85 for Djokovic, 83 for Raonic.

The Canadian's first serve percentage dipped down to 57% by the end. That could have been costly considering the fine margins and the fact that the Canadian converted 84%  of successful first serves onto the scoreboard.

Image source, Reuters

James Diamond: Raonic will be v disappointed with that. Had a lot of chances to take the initiative and didn't. Very promising for Murray though. Djokovic clearly still isn't at his best.

Novak Djokovic: "I managed to hang in there mentally and stay strong and believed that the opportunities would come and that I could take them.

"Milos was hanging in there and only one or two points separated us in the second set. It could haver gone either way this match. He's such a strong player and has got firepower.

"Thank you for staying this late."

Leon Smith
Great Britain Davis Cup captain on Radio 5 live sports extra

Image source, Reuters

That was a big win, you can see how pleased he is because he had to come through some big tests. It was a great match with a lot of excitement.

Novak Djokovic gets himslef out of danger with a backhand half-volley that generated power from nowhere - a real one-inch punch of a shot. 5-5.

And an ace! 6-5! On serve, but match point Djokovic.

Novak Djokovic snatches back a mini-break as Milos Raonic bumps a forehand long. 4-4.

Roller-coaster.

Raonic bops away a forehand though. 4-5 and two serves to come from Djokovic.

Novak Djokovic double faults - perhaps trying to second-guess Milos Raonic who was moving about on the baseline.

Raonic is just three points away.

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Milos Raonic chokes a backhand under little pressure.

The players towel down with the scores level and shoot-out on serve.

Novak Djokovic trains his fire on the Milos Raonic backhand, going for a wrong-footer and comes up cherries. Mini-break taken back. 2-2.

But Raonic holds with a boshing great smash on the next point. 2-3

Milos Raonic punches a backhand across court after an inviting high and short bounce and, although Djokovic got there, he could not keep a lid on his reply.

Mini-break.

Novak Djokovic holds serve at the second attempt, but it is advantage Canada.

Milos Raonic holds serve on the opening point of the tie-break.

Leon Smith
Great Britain Davis Cup captain on Radio 5 live sports extra

Saving a set point shows how resolute Djokovic is. That was great play to turn that game again around. He stood strong, defended and countered well and now he's bouncing around.

Novak Djokovic flicks a forehand across court to take us into the shoot-out.

Does that missed chance count against Raonic psychlogically?

A double fault - Djokovic's first of the match - puts the world number two in some 15-30-style sticky stuff.

Novak Djokovic is at the net - as vulnerable as a peach in a blender - but he survives to 30-30.

That is over-cooked though from Djokovic. Break point.

A hold-up for some camera flash. A first serve missed. Into a rally behind a second. Raonic with a shot down the line on his forehand....NET!

Deuce.

Image source, AP

Milos Raonic is taking this set to a tie-break at worse.

Suddenly there is helium in his heels and more torque in his celebratory fist grip. 

Milos Raonic's forehand is windmilling once more.

A thump down the line brings him to 15-30 up and within two points of the second set and parity.

Two backhands dumped into the net - the second after an extraordinary nip-and-tuck rally - conspire against the Canadian.

Novak Djokovic - tetchy with some noise from the crowd and short of his own stratospheric best - is off the hook.

Gigi Salmon
BBC Radio 5 live sports extra commentator

Image source, Getty Images

I wonder who Novak Djokovic is talking to? There's a lot of people in his box but they don't seem to be looking at him. Boris averted his eyes elsewhere.

Milos Raonic is clubbing serves like a caveman on a whack-a-mole machine.

He is back with the bit between his teeth, holding to 15.

Djokovic- almost inconceivably - is serving to stay in the set.