Excellent from Vasek Pospsil. Dan Evans barely sticks strings on the ball as the Canadian goes aggressive with his serve. Not as aggressive as Trainspotting psycho Begbie, more Renton. A bit of menace to scare off his rival when needed. A hold to love racks up his third game on the bounce.

John Lloyd
Former GB Davis Cup captain on BBC Red Button

That Pospisil forehand is a big weapon and Evans must make sure his slice is deep and with enough bite that it doesn’t allow Pospisil to take over the rally.

Image source, AFP

Vasek Pospisil would be great as one of those headset-wearing people employed by live TV shows to whip the crowd into a frenzy. He gees up the home fans as Evans hits a forehand long for 15-30. He senses something might be brewing. 

Evans crumbles at 30-30, a double fault arrives at the most inopportune of times. Break point to Canada...

Evans, on the run, slaps a backhand from the baseline into the net. Pospisil jumps into the air, clenching his fist and whooping his vocal chords.

Image source, AFP

Sloppy. Vasek Pospisil moves within a point of the game, only to mess it up by missing a volley which was easier than the one at 30-40. The lanky Canadian plants that wide, then skews a crosscourt backhand well wide on his next opportunity.

Evans keeps dragging him back by the scruff of the neck, only for Pospisil to find another burst of energy to wriggle clear and wrap up the hold after a third deuce.

Canada captain Martin Laurendeau puffs his cheeks out in a sigh of relief. Quite.

Never mind Will Grigg. It is Dan Evans who is on fire. The Brummie dismantles the Pospisil serve, reading his deliveries to punch back a couple of wonderful winners for 15-30.

The pair slug it out in a baseline rally, Pospisil eventually buckling first. Two break points to the Brit...

Pospisil fiddles with his gold chain, pulls up the shoulder of his red tee, looking for his composure. He finds it, forcing Evans wide and then hammering down a winning volley. Deuce...

A service game straight out of the coaching manual. No vulnerability from Evans after that break, upping the tempo to blitz Pospisil. He guides a forehand winner down the line to leave Pospisil flapping at thin Canadian air. 

John Lloyd
Former GB Davis Cup captain on BBC Red Button

I think Pospisil was expecting a chipped return and Dan took it at shoulder height and rifled it down the line. That game showed the variety and feel Dan has in his game. It’s tough to play against because very few players play like him. You don’t face opponents like him every week on the circuit.

Dan Evans takes it! And he takes it style. Vasek Pospisil leaves a forehand short, Evans bounding on to it like an excited labrador to power in the winner down the line. 

First blood to Great Britain!

Image source, AFP

Here we go then. Dan Evans takes a good look at the Pospisil serve. Evans grunts as he batters back a baseline forehand at 15-30, but fails to impose himself as Pospisil out-powers him in the rally with a meaty forehand.

Wait a minute...Pospisil can't take on any momentum, slapping a forehand into the tramlines. Break point for Dan Evans...

Image source, AFP

You would think Dan Evans has the variety to cause plenty of problems for Vasek Pospisil. But first he has to make sure he looks about his own serve. That he does. As Jamie Baker suggests, Evans does target the Pospisil backhand.

A weak return at 40-30 is pounced on by Evans, who wallops a backhand of his own right into the corner. Pospisil double-takes at the spot. Is he going to challenge? No. All Square.

Jamie Baker
Former GB Davis Cup player on BBC Two

Regardless of Vasek Pospisil's injury, yesterday's doubles match was always going to be crucial in having a bearing on today's matches. The chances of Pospisil beating Dan Evans are much slimmer now. 

You will see Evans get into face of Pospisil, use his variety well and pummel his backhand. That's by far the Canadian's weakest side.

Perfect start for Evo as he wins the first point of the match, only for the big-serving Pospisil to hit back with some bombs. Once he stops juggling and gains control of the ball. He ploughs an ace down  the middle to wrap up the hold.

Canada win the toss, Pospisil serves first. 

Let's. Play. Tennis!

Image source, AFP

Canada 0-1 Great Britain: Dan Evans, Britain's leading player in the absence of Andy Murray, puts his team ahead with a straightforward 6-3 6-3 6-4 win against 17-year-old Denis Shapovalov.

Canada 1-1 Great Britain: Vasek Pospisil, ranked 86 places below Britain's Kyle Edmund at 133rd in the world, overcomes a leg injury to win 6-4 6-1 7-6 (7-3).

Canada 1-2 Great Britain: Jamie Murray and Dom Inglot put the visitors ahead with a hard-fought victory in Saturday's doubles contest against Pospisil and veteran Daniel Nestor.

See all the highlights from the opening two days here.

As well as following these wise words, don't forget you can also watch the action right here on this page and on the Red Button.

And it's live now! Sue Barker presents the television coverage with former GB Davis Cup players John Lloyd and Jamie Baker providing the analysis.

If you want to catch up with the pictures later then there will be highlights on BBC Two at 23:15 GMT.

A beaming Pospisil looks like he has just been told he has won the pools as he poses for a pre-match photo. Evans doesn't even bother with half a grin. He's got his game face on.

Here's what is happening (as if you don't already know). Great Britain are one rubber away from winning this David Cup tie in Canada, which would set up a quarter-final tie in France.

Dan Evans is the man given first dibs on being the British hero, taking on Vasek Pospisil in today's opening singles match.

Evans is ranked a career-high 45th after his stunning run in the Australian Open, while former Wimbledon quarter-finalist Pospisil has dropped down to 133rd after a suspect 2016. And the Canadian is carrying a knee injury.

But if Pospisil overcomes fitness and Evans then we'll go to a deciding rubber between Kyle Edmund and teenager Denis Shapovalov.

Image source, #bbctennis

Hello! Don't let Jeremy Beadle/Lisa Riley/Harry Hill get in the way today with their 'hilarious' home video clips, whatever you do.

We could be here for 20 minutes, or we could be here for six hours. We just don't know. The magic of sport, eh?