But it was not all plain sailing in the first-half with Sancho pulling the strings for Dortmund.
They were fantastic. To play after Sunday, with one day less recovery [than Dortmund], we need to praise them.
And we saw flashes of quality from both players during the match.
Mauricio Pochettino has revealed he put on a half-time video session to remind his players of the game plan during Tottenham's emphatic 3-0 Champions League victory over Borussia Dortmund. When you are in front of a team like Borussia Dortmund, you have to show respect.
Harry Kane and Dele Alli are still out of action, while Vincent Janssen has not been included in Tottenham's squad for the Champions League knockout rounds.
"Today it's 3-0 and maybe everyone says, "Oh, fantastic decision", or maybe if it's a different result I'm the worst coach in the world", he said.
It was nearly the flawless start for Tottenham on seven minutes, as Lucas Moura flashed his volley narrowly wide of Roman Burki's left-hand post.
'For me, it is only the first leg, it is only the first half of the tie'.
Juan Foyth gifted Dortmund their first sight of goal when he dwelt on the ball too long and was alertly dispossessed by Christian Pulisic. Pochettino also got his players to get closer to Jadon Sancho, and the England worldwide was subdued in the second period.
England winger Sancho hit top gear on several occasions in a mesmerising first-half display, leaving two Tottenham midfielders for dead and linking with Pulisic, whose shot was blocked at the last minute.
If Son was excellent, Vertonghen was even better.
Suddenly, Dortmund had no answers to Tottenham's high-tempo pressing and it was Vertonghen who was the hosts' unlikely hero in the 83rd minute as he volleyed home from Serge Aurier's cross.
Substitute Fernando Llorente headed Spurs into dreamland three minutes later, and they will take their three-goal lead back to Germany for the second leg on March 5, a result that already looks beyond doubt unless Spurs stage a dramatic collapse.
