City were set-up with two holding midfielders as Spurs walked away with a 1-0 victory.
When asked about his tactics at the Tottenham Hotspur Stadium, he said: "It doesn't count if the decision was good or not after the game; nothing changes. We have sometimes made decisions that are difficult to understand, but we win and everyone says we are genius.
"We had a plan and the players know why we took those decisions for the way we wanted to play in the first leg. We did it quite well.
"Sometimes it doesn't work that well, because the competition is tough and the opponents are good. Tottenham are a team that runs in behind a lot and we controlled it quite well.
"We thought the game would be more low-tempo and there would be more passes. We would attack in the right moment - we have two games, not one.