45 minutes: … Dortmund almost score! They take it short, Sancho chips to the far post, Zagadou should attend a header home from close range. Foyth, and Lloris is ready to be taken away and taken away with a strong hand. Great save! Another corner follows, but that comes to nought.
44 minutes: Goetze barges his way through a couple of challenges down the right and earns a corner. From which …
42 minutes: Hakimi walks on the right path. He looks for a lot in the middle, but the ball takes a huge deflection off Vertonghen and loops into the arms of Lloris.
40 minutes: Sancho was livid at the finish of the referee there. You can not blame him. But it was a wonderful, exhilarating run by the English youngster, who has been the star turn in this first half.
38 minutes: Sancho tears down the inside-right channel, gliding into the center. Sissoko, having been burned for speed, cynically clips Sancho's foot. Sissoko, but the referee waves play on it. That's a very poor decision. Sissoko and Spurs have got away with one there.
37 min: An odd cameo from Burki, who has the ball at his feet, lets it clank between his legs, spins through 360 degrees in confusion, then rediscovers his poise well enough to scoop a pass over Moura towards Toprak in the left-back position. From the ridiculous to the sublime.
36 minutes: Eriksen finds Son free down the left. He enters the box and hits a hard cross-cum shot toward Moura in the middle. Burki, at the near post, kicks away from danger.
35 minutes: Delaney has a crack from a position to the left of the D. It's heading into the bottom left. Lloris gets down well, but can only parry straight back into the box. Sanchez can not be quite clear; Sancho can not quite shoot. Spurs eventually clear their lines.
34 minutes: This is a little better from Spurs, as Moura nearly fashions space for a shot 25 yards out. Then Vertonghen whips a cross in from the left; Zagadou clears. Finally Aurier and Foyth combine crisply on the right touchline; Foyth cuts one back for Eriksen, who blazes a wild first-time effort over the bar from the edge of the box.
32 minutes: Son tries to trick Zagadou down the right with an elaborate dummy. It almost comes off heights out of pitch. Still nothing quite working for the hosts.
30 min: But then they're not getting any help from the referee either. Hakimi stands on Vertonghen's toe, near the left-hand corner flag, but spurs are not awarded a free kick in a dangerous position. Sancho off on the right goal kick, Gotze on the right. Not quite.
29 min: Alderweireld creams a long pass down the inside-left, hoping to release Son. But Toprak calmly flicks a header back to Burki and that's that dealt with. Spurs are not in the final third right now.
27 minutes: A much-needed period of sterile domination for spurs. They're going nowhere, but they've pushed Dortmund back after a period in which the visitors were beginning to ask some awkward questions.
25 minutes: Not much happening for Spurs right now. Moura drops deep in the hope of making something happen, but his play is nervous and fidgety and he gives up possession with some loose control and a poor ball forward.
23 minutes: Sancho runs at Spurs down the inside-right again, and in tandem with Gotze causes all sorts of bother in the box. Fortunately for Spurs, they're ready for the crowd out in numbers, and at eventual shot squirts through the thicket and into the arms of Lloris. Dortmund are beginning to look extremely dangerous.
21 minutes: Sancho is scampering clear down the right wing, thanks to a first-time pass from Dahoud. For a second he looks as though he'll make it into the box for a shot, turning Sanchez this way and that. But he decides to cross, and his low ball, intended for Gotze, is cut out well by Foyth.
20 min: Vertonghen clears Pulisic's free kick with ease, but Witsel comes back at Spurs and sends a low fizzer towards the bottom left. Lloris is behind it all the way and gathers confidently.
19 minutes: Sissoko slides in clumsily on Hakimi as the right-back races down the wing. This is a free kick to the right of the Spurs box, which is now loaded with Dortmund players.
18 minutes: The visitors enjoy another period of sterile domination. This match has had a nice back-and-forth swing so far, with both teams enjoying periods of possession. Nice.
16 minutes: Dortmund have had a sniff now, and it's suddenly enlivened them. Sancho, but the young striker takes a heavy touch that allows Vertonghen to come across and clear. He should have made it to the area for a shot on goal.
15 minutes: Foyth over-elaborates on the left-hand edge of his own box. Gotze strips him of possession and sets up Pulisic for a dribble into the area. He's faced with a tight angle, and has Sancho in the middle, waiting to tap home. But he tries to beat Lloris, who is not getting beaten at his near post and kicks away.
14 minutes: Passes are not sticking right now. Sanchez plays a poor one forward, Sancho intercepts, looks for Goetze, if over.
12 minutes: Good work by Aurier, who chases on Eriksen Spurs the first corner of the match. Eriksen takes. Foyth fresh-air kicks, and Dortmund can break upfield. Pulisic turns on the jets down the left and aurier pulls him back by the elastic of his trousers. That's another first for Aurier: the first yellow of the game.
10 minutes: And it's giving Dortmund something to think about. Winks bursts into space in the middle of the park, and should release Son down the inside right channel, but overhits the pass. Not by much; small margins.
9 min: After a slow-ish start, Spurs are beginning to get more into the game. They enjoy an extended period of possession for the first time this evening.
7 minutes: Spurs nearly take the lead in spectacular style! Delaney's header upfield is not all that. Sanchez returns with the ball drops towards Moura, just inside the box on the left. Moura takes the ball down with one touch, then creams a diagonal. So closde. Burki was not getting to that.
6 minutes: Delaney slips a clever ball down the inside-left channel, into acres, but Pulisic was a bit slow to read it. Foyth plays it back to Lloris, who gives Spurs fans a shudder, nearly getting closed down by Sancho. But he gets it away.
4 minutes: Dortmund are enjoying the lion's share of possession in these early exchanges, but almost all of it is in their half. Gotze and Pulisic try to get positive down the left, but Foyth is in charge of this situation and clears.
2 minutes: Dortmund spend some more time knocking the ball around at the back. Then Delaney scoops out of the left for Sancho, who drops to a shoulder and scoot past Foyth, but Spurs hold their shape and eventually the ball's won back. Early signs that are not planning to sit back all evening.
And we're off! The visitors get the party started, as Wembley says again in noise. Roars pinging off the walls. Dortmund stroke it around the back awhile, then throw the ball to Winks, who's going to throw the ball out for a throw. Everyone just happy to get their first touch.
A minute's silence before kick-off. It's in tribute to England's 1966 World Cup goalkeeping hero Gordon Banks, who passed away yesterday, and the tragic Emiliano Sala. It's perfectly observed, then it segues into warm applause. A touching moment. RIP.
The teams are out! A wonderful European atmosphere at Wembley, not least because the Dortmund fans have been in situ and have been giving it plenty, Tottenham Hotspur sports their world-famous lilywhite shirts, while Dortmund are in their equally storied yellow and black. It's an aesthetic treat, my old-school football-loving pals. We'll be off in a couple of minutes!
A relaxed Mauricio Pochettino speaks to BT Sport! "I am always positive. Of course we have the utmost respect for our opponent, Borussia Dortmund is a fantastic team and wants to be very competitive. But I believe in my players. It wants to be different, we can not compare to last season, the momentum, the circumstance, the situation is different. We believe we need to be at our best if we want to win. The competitive level is so high, with the Premier League it is the best competition, and we need to be 100 percent focused. We have tried to provide the team with fresh legs. I trust and believe in all the players and I hope in the right in my selection. So we can win today. "
A reminder that VAR is in use for the first time in the Champions League this week. The VAR team wants to "constantly check for the following four match-changing situations: goals, incidents in the area, red cards, and mistaken identity". "Two matches in, and there's no major controversy that would lead you to the question. But give it time. Older readers may recall Andy Townsend's Tactics Truck, from 2001 ITV light-entertainment vehicle The Premiership. The set-up's not a million miles away from that. Tragedy + time = comedy.
Pennant watch: Tottenham's crest is a stone-cold design classic, but the same can not be said of this pennant. Some major issues with the text squeezed at the top, it's all over the place. Hugo Lloris's shirt is on something of a shoogly peg. A cheap and cheerful metaphor for his recent form.
Both sides make four changes from their weekend XIs. Of the team named for the 3-1 win over Leicester City, Tottenham drop Kieran Tripper, Danny Rose, Oliver Skipp and Fernando Llorente to the bench. Their places are taken by Serge Aurier, Toby Alderweireld, Juan Foyth and Lucas Moura. Jan Vertonghen wants to play left wing-back as Spurs start with a back three.
Dortmund drop Raphael Guerreiro, Maximilian Philipp, Lucasz Piszczek and Julian Weigl from the team capitulated against Hoffenheim. Thomas Delaney, Omer Toprak, Dan-Axel Zagadou and Chelsea-bound Christian Pulisic take their places.
Tottenham Hotspur: Lloris, Aurier, Sanchez, Foyth, Alderweireld, Vertonghen, Sissoko, Winks, Eriksen, Son, Lucas Moura.
Subs: Gazzaniga, Trippier, Rose, Lamela, Wanyama, Llorente, Skipp.
Borussia Dortmund: Burki, Hakimi, Zagadou, Toprak, Diallo, Witsel, Delaney, Sancho, Dahoud, Pulisic, Gotze.
Subs: Hitz, Guerreiro, Balerdi, Philip, Wolf, Schmelzer, Bruun Larsen.
Referee: Antonio Jesus Lopez Nieto (Spain).
Hello, and welcome to Jazz Club
According to their sporting director Michael Zorc, Borussia Dortmund have eschewed former coach Jurgen Klopp's "heavy metal football" in favor of a "modern jazz approach" built around bandleader Lucien Favre's inventive new 4-2-3-1 arrangement. Nice! On the wings, Jadon Sancho and Jacob Bruun Larsen. Playing full back, Achraf Hakimi. Axel Witsel and Mario Gotze in midfield. Theydon Bois on guitar. Clam on bass.
The North Rhine-Westphalia Big Band are locked into a groove this season. They're leading the league, scorers top with 54 goals, currently on their first title since 2012. They only conceded two goals en route to winning Group A, keeping five clean sheets in six games. There's a good vibe about the place. Really nice.
But they have lost a little rhythm of late. A couple of weekends ago, a 3-3 draw at home to Werder Bremen in the cup led to defeat on penalties. Hoffenheim in the league, allowing Bayern Munich to close the gap at the top to five points. They're not exactly on the stage, but it's a nonetheless word.
Tottenham's season meanwhile has been driven along by some extremely experimental polyrhythms, They were forced to step out of the groups after a dismal start; they were recently knocked out of both domestic cups in a gritty four-day stretch; Harry Kane and Dele Alli return to their new home. Great!
So this is a close one to call. Form's no guide. Neither is the recent head-to-head, with Dortmund knocking Spurs out of the Europa League 5-1 on aggregate in 2016, and Spurs winning home and away in the Champions League groups last season. This tie is perfectly pitched. It's on!
The session begins at: 8pm GMT.