He said: "Losing is losing. But losing on penalties is different to losing in 90 minutes.
"When you lose in 90 minutes, normally the best team wins. Penalties decide which teams win trophies or go through the next round of a competition, but they are details.
"If I give my opinion about the 90 minutes, I think Chelsea did not deserve to lose. We controlled the game, not for 10, 15 or 20 minutes - we controlled the game for 90 minutes in quite an easy way.
"We played without a striker in the first half and when you do that it is difficult to bring the game into the opponent's half because you don't have a target man or someone to hold the ball-up.
"But even without a striker, the three boys in attack gave us life and speed and the goal was a good example of that.
"In the second half with Claudio the team had a presence there and we were playing much more in the opponent's half. But Pizarro could not play 90 minutes.
"He has had a problem in his back in the last two or three days and could not train.
"This was the first time in my life I have played without a striker. Formations depend on the players you have available. I want to play 4-4-2 or 4-3-3 but sometimes you have to adapt in relation to the players I have available."