The two sides are meeting in Group H at Wembley, with Dortmund returning to the scene of their 2013 final defeat to Bayern Munich.
Particularly with Dortmund's current injury issues, Pochettino should snatch at the chance to give Tottenham an early advantage at progressing to the knockout rounds. In theory it should be Real Madrid first and the others trying for second, but football is not about theory. We need to show that we are competitive and we can go ahead and be in the next stage.
"It will be tough because Dortmund is a great, great team but in our mind our mentality is to try to win and be aggressive from the first ball".
"It is well documented that Wembley hasn't been a happy hunting ground for Spurs but they are taken to right that wrong against a Dortmund side who were too good for the PL [Premier League] outfit in the Europa League two seasons ago", he wrote.
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"In Italy, France and Spain, the Champions League is the most important competition, but in English culture, it is the Premier League. In the last few games we've played at Wembley, we've played well and deserved more".
"The first game is always important", he told a pre-match news conference.
"We've got to play our game".
"It was a very painful experience because we could not be at the level we should have been, but today it's not an excuse".
Tottenham striker Harry Kane expects his team to hold their own against the Germans, even without star midfielder Alli. Bild quote Dortmund sporting manager Michael Zorc as saying: "Playing in Wembley is one of the absolute highlights of a career for every footballer". But despite the intimidating opposition, Pochettino wants his side to make a fast start to the campaign.