Our feeling was we never felt the confidence to play.
Son opened the scoring, meaning he now has four goals in his last four games since returning from the Asian Cup, before Jan Vertonghen and Fernando Llorente completed the scoreline. "Tottenham were the better team", said Sancho.
"We play much better than people assess us sometimes, but you can not fight with the perception of people".
"Of course 3-0 is a very good result but when you have a team in front of you like Borussia Dortmund I think always you respect them and of course we need to think we need to go to Dortmund with the idea to win".
We were playing with such composure that Dortmund could barely get the ball as we knocked it about, pulling them from side to side and being patient in our possession.
The South Korea global found the net for the fourth successive game, helping Spurs take a commanding lead in their last-16 tie.
'Next time Son scores I will go to the dressing room, have a shower and wait for the game to finish, ' Pochettino joked afterwards. 'He was fantastic again. "He translates good energy and his performance in every game is improving". But Tottenham's manager played down the success of his tactics.
"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.
"The balance is the most important thing".
"It was a massive victory for us and the players deserve all the credit".
Spurs face a very different Dortmund side to the team they beat both at home and away in last season's group stages - with Pierre-Emerick Aubameyang, Andriy Yarmolenko, Shinji Kagawa and Nuri Sahin among the players to have left the club - yet their lofty position in the league this is still a team with flaws. But I prefer players who make mistakes trying to play.
"I was a completely different type of centre-back, not with his quality".