Guardiola says he trusts the Citizens and believes they have what it takes to crash out the Bundesliga outfit.
Manchester City are in the form of their lives this season and are still in contention to win four trophies.
Having already booked a place in the Carabao Cup final, the Manchester-based club will be looking to qualify for the FA Cup final when they come up against Thomas Tuchel’s Chelsea on Saturday.
Guardiola’s men are comfortably sitting at the summit of the Premier League table, eleven points above second place Manchester United.
Ahead of City’s trip to Germany to face Dortmund in the Champions League on Wednesday, the Spanish coach said: “After 27 wins in 29 games, if I don’t trust them, we have a big problem.”
“I’d be crazy. We can win or lose. If we lose, you can kill me, you first. What we’ve done so far, we deserve to be in this position. We know if we win, we go through.”
“In the Premier League we need three wins and one draw, as we expect Manchester United to win their last seven games. What we’ve done has given us this opportunity. If we go out, we’ll be disappointed, but there’s another opportunity.
“We lost against Lyon. We were better, but we went out. We are going to be in the Champions League for the 11th season in a row next season, so we’ll be there again and that’s fantastic.”
“But now is the time to make another step which everyone wants. The players were sad last season and now we have the other opportunity.
“We have to win, we have to do it, nobody will say ‘just go to the semi finals’. We have to do it. We’ll see, but I’m so excited and happy to travel to Germany to try to do it and see what happens.”