After a testing first half, the Belgian transformed into one of their biggest attacking threats after the break, providing a sumptuous ball for Son's goal and continuing to send in terrific crosses as the second half progressed - and to top it all off, Vertonghen got on the scoresheet with under 10 minutes to go.
Had that header gone in, it would have been a very different contest - but thanks to our skipper, it didn't and we were able to take full advantage at the other end upon the restart.
Asked about Spurs winning again without two of their key players, Pochettino said: "It's good because the expectation when people watch Tottenham is not only to win, it's to see a performance like the dream team of Barcelona with [Johan] Cruyff or Milan of Arrigo Sacchi". Our feeling was we never felt the confidence to play.
"It was a massive victory and the players deserve all the credit". Pochettino had sprung a tactical surprise by naming Jan Foyth as part of a back three - with Vertonghen wide left - and following a few half-time tweaks his team thrilled most of the 71,214 in attendance with their second-half showing. Of course 3-0 is a very good result but when you have in front a team like Dortmund you always need to respect them.
'Next time Son scores I will go to the dressing room, have a shower and wait for the game to finish, ' Pochettino joked afterwards.
"Of course we are happy now because it's a good result but there's still a lot of work to do". He smiles and he creates energy in every single game. Four minutes from time, Eriksen delivered a corner which Llorente, only on the pitch for two minutes, glanced past the Dortmund keeper to give us a very healthy 3-0 advantage to take to Germany for the return on 5 March.
"That is very good, we feel very proud when people expect that from our performance, but sometimes people underestimate us". But I prefer players who make mistakes trying to play.