Pep Guardiola says a poor first-half display by his side against Monaco is the reason Manchester City are out of the Champions League.
City were knocked out of the competition by the French side who recorded a 3 - 1 win on Wednesday night and an aggregate 6 - 6 victory at the Stade Louis.
Guardiola argued that his side were slow to start the game and that led to two goals from Monaco within the first 30 minutes.
Speaking to ManCity.com, Guardiola said: “We played exceptional in the second half, but the first one we forgot to be there.
“We are a team that wanted to defend aggressively without the ball. In the second half, it was much better but it wasn’t enough.
“Normally we play until half-time at a good level but tonight, we didn’t do that. It’s happened, the opponent was there and we will learn from this."
Pep admitted the late Monaco winner, which came from a set-piece, was a killer blow - but felt by that time, his team should have been in control.
“We have a team with not much experience in this kind of competition," he said. "At this level, when you concede and play the way we did in the first 45 minutes, it is so difficult. In the second half, we had the chances to score a lot of goals and we didn’t. That’s why we are out.
“In the first half, they could have scored more. Barcelona scored three goals through set pieces, two penalties and a free kick, so set pieces are important.
“That is my only sad thing - the way we played in that first 45 minutes. You can play and the opponent can beat you, but we were not there. In the right moment, we should be there but we weren’t."
Trailing 5 - 3 from the first leg, Monaco had only attack as an option to qualify and attck they did which bore fruits.
Kylian Mbappe and Fabinho score in the first half to make the tie 5 - 5 on aggregate in Monaco's favout however Leroy Sane threatened to spoil the party in the second half with a goal until Bakayoko scored the all important goal to send Monaco through.
The teams who have qualified for the quarter-final are Atletico, Dortmund, Leicester City, Barcelona, Juventus, Bayern Munich, Real Madrid and AS Monaco.