These two are certainly young men in a hurry, rattling through points quicker than it takes to blink. Almost.

Edmund has a break point - he's got it!

"Look young man, I'm the boss around here. OK?"

That's the message being sent out to Denis Shapovalov by the comparatively-senior 22-year-old Kyle Edmund.

Shapovalov briefly threatens the Edmund serve, before the Briton stamps his authority all over his opponent with that hammer of a forehand.

Image source, AFP/GETTY

Oh, to be 17 again. Confidence, fearlessness, youthful exuberance. What a great age. Apart from the acne threatening to make an appearance ahead of a big party.

Denis Shapovalov has got it all - that's confidence, fearlessness and youthful exuberance, not acne. He kicks off set three with another brilliant hold.

Kyle Edmund has only taken an hour to move within a set of sticking Great Britain into the Davis Cup quarter-finals.

Another quick win here and we'll all be able to watch Lady Gaga at the Superbowl. Didn't she do it the other year?

Image source, Getty Images

Kyle Edmund's serve has been stronger than Arnie Schwarzenegger's arms. And he is not going to be outpowered in this crucial service game.

Edmund moves 30-0 ahead to continue his recent domination on his serve, Shapovalov briefly having hope at 30-15, before the Brit moves within a point of the second set.

Can he wrap this up sharpish? Yes! An ace out wide is followed by a fist pump.

Image source, Getty Images

Jamie Baker
Former GB Davis Cup player on BBC Red Button

The best thing for me there was the big roar when Edmund got the break – he knew how decisive that was, and how with all the inexperience and youth down the other end, a two-set-lead will be almost impossible for him to come back from.

Now then. Kyle Edmund has been like a cat toying with a mouse, it appears.

The Briton, after playing along with Denis Shapovalov for the past few games, moves in for the kill.

Three break points turn into two, the teenager saving one with a big first serve. But then he goes wide with a backhand in the next point, Edmund roaring his pleasure as he moves within a service hold of the second set.

Image source, AFP

While Shapovalov is looking alright on his own serve, he isn't getting anywhere near the Edmund serve. Another love hold takes Edmund to 11-0 on his serve in the past three games. Solid.

Shapovalov seems to be cruising towards Hold Town again, leading 40-0, only for Edmund to put the brakes on. The Brit pounces on a second serve to claw one back, that's as good as it gets.

And is this why Shapovalov is said to have the Feds about him? The leftie glides into two poetic one-handed backhands, in almost a mirror image of the great man, the second of which dips and fizzes past a stationary Edmund. 

Image source, AFP

Kyle Edmund looks a different beast to the bloke we saw on Friday. Probably because Denis Shapovalov hasn't got the nous to get inside his head like Vasek Pospisil. 

Edmund batters his way to another hold-to-love. No answers from Shapovalov.

Image source, AFP

Denis Shapovalov has been, apparently, likened by some to Roger Federer. No pressure there then. He's definitely got a bit of a young Lleyton Hewitt about him - in looks if not playing style. Long blond surfer-style locks, peeking out of the white snap-back baseball cap.

Anyway...he holds again. And his serve has not been troubled too much by Kyle Edmund in this second set.

Image source, AFP

From the sublime to the ridiculous. And back again. Kyle Edmund piles down an ace, misses the target with a double fault, then cracks down another ace.

Shapovalov somehow sticks strings on a trademark Edmund forehand, only serving up a high ball for the Brit to batter down an overhead winner.

Then he wraps up the hold to put another question in the 17-year-old Canadian's mind.

Image source, AFP

Dan Evans shouts plenty of encouragement from the British bench to his team-mate Kyle Edmund. Whatever he is saying it doesn't help the Yorkshireman make any major in-roads to the Canadian's serve. 

Edmund, like he did in the opener, will be happy to bide his time.

Kyle Edmund isn't getting distracted by his youthful opponent's shot-making skills, concentrating on doing the basics well. 

Denis Shapovalov is bounding forward to meet Edmund's first serve - but, as this graphic shows, it isn't working.

Image source, #bbctennis

Denis Shapovalov started the opening set with a couple of love holds, starting the second in the same shape. The omens are good for Kyle Edmund then.

Seems to be quite a few empty seats in the TD Place Arena now. Where's everyone gone? Is Bieber playing in town or something?

John Lloyd
Former GB Davis Cup captain on BBC Red Button

I thought it was excellent the way Kyle stood up against the pace, served very well and backed it up well. I think Kyle is playing so much better than in his first match. Obviously the standard of his opponent is different, but a very good first set for Kyle Edmund.

Laura: First set gone in a half hour. Whichever way this rubber goes looks like these boys want to watch Superbowl LI post-match.

Kyle Edmund serving for the first set... job done. Just

Denis Shapovalov keeps within touching distance of his opponent at 30-30, dragging him back to deuce when he threatens to jog away.

Edmund takes out some of his anger on his next serve, lashing down a 136mph ace. A heavy forehand goes long to give Shapovalov hope, only for Edmund to plug into the power socket again.

Another blistering ace is too hot for the Canadian to handle and the Briton wraps up the opener in about half an hour.

Image source, Getty Images

John Lloyd
Former GB Davis Cup captain on BBC Red Button

That was the first wild game we’ve seen from Shapovalov. Very good play from Kyle Edmund but Shapovalov looked like a youngster in that game, inexperienced.

A half chance for Kyle Edmund at 15-30 becomes an all-singing, all-dancing, full chance. 

Edmund has his teenage opponent on the run, dragging him right and left, and back again, before moving into the net to hammer down the winner. 

First break point of the match to the Brit...

Let's see what Shapovalov is made of. Wow. Stern stuff. A thumping ace saves the first break point, but then he goes long in break point #2.

He challenges. The technology shows us the ball landed about the length of a baby cobra away from the baseline...