Guardiola also talked down the significance of the role of himself and Carlo Ancelotti in the game, saying that in the Champions League, games are won by the decision-making of players on the field.
"History is there, we can't change it, but it's eleven against eleven and one ball moving. The players decide their decision making," he said.
"You can imagine a plan but it's eleven vs eleven, the quality of the (players), how strong they are, it will make a difference. This game is players, it won't be Carlo or myself who win it."
There is some history that is in City's favour, however - two years ago Guardiola's side knocked the current La Liga leaders out of the competition in the last 16 stage after winning both legs 2-1.