Son, who has scored nine goals in 11 games against Dortmund, added: “The timing of the first goal was very important, the cross was unreal, I didn’t have to do anything, just touch the ball.
“It’s not finished, we have to focus on the second game too. Harry Kane or Dele Alli are very important for us but we have players who can come in and do well. We showed that, Fernando came on too and scored an important goal.”
Pochettino also warned that, despite the fact they will take a 3-0 lead to Dortmund on March 5, Tottenham cannot take their progression for granted.
“3-0 is a very good result, but when you have a team like Borussia Dortmund in front of you, always respect and we need to think we need to go to Dortmund with the idea to win. We are happy now, but there is still a lot of work to do,” said Pochettino.