Guardiola insists there'll be no underestimating United.
"There is no doubt about it (that United have improved)," says Guardiola.
"A team that was able to win in Turin when in the last nine years it was not able to lose one game, they had 10-15 mins of problems after Cristiano's goal – apart from that they were so stable.
"I see a team with a lot of commitment for what they have to do, aggressive without the ball, everybody runs backwards. Now is a good moment so of course confidence, so always it is complicated.
"In the whole history of Man City it was never easy to beat United and United beat City more times.
"It is a good rival, to score three points and leave them away - so we are going to try especially to have a good game. We will meet the players, We are going to suggest what will happen what we should do to win the game."