Manchester City will undoubtedly defeat Bayern Munich in the return match because Bayern Munich's players are not as physically fit as Manchester City and scoring 3-0 wasn't something that Bayern Munich could easily recover from. Even if Bayern Munich were to score, I don't believe they would be able to score as many as 3-0.
I'm confident that Manchester City will still defeat Bayern Munich because they have excellent players who don't hesitate or make mistakes when scoring goals.
You are right Hajibagi, there is no doubt that Manchester City recent performance has been impressive in the various competitions they have participated in. Even with a 3-0 advantage, it will be a safe point for them when they travel to the Allianz Arena stadium. I believe the situation will change quite drastically in the second leg game because Bayern Munich will play more aggressively to chase victory with a big score of this, of course Manchester City already has a stronger game tactic in the second leg.
there is no doubt that manchester city will qualify for the semifinals and also they are more confident to welcome the second leg match.