"I said many times I don't judge", stated Guardiola.
The pressure is mounting on United boss Jose Mourinho after the humiliating 3-0 home defeat to Tottenham last time out.
The Red Devils signed veteran goalkeeper Lee Grant, young full-back Diogo Dalot, midfielder Fred and were interested in a sensational move for Cristiano Ronaldo.
"He's played three very good matches and that's not easy to do when your team loses two of them".
The man who labeled himself a "special one" when introducing himself to English soccer at Chelsea in 2004 said guiding United to a second-place finish in the Premier League last season, 19 points behind rival Manchester City, was "one of my greatest achievements in football".
"It's a process and it's a process that has risks - especially if you make the defensive mistakes that breaks that dynamic".
"Only the players know exactly who we are and normally even with the players we are judged, if they play we are good, if he doesn't play the manager is not good".
"Win at Burnley. Then win against Watford".
United haven't lost three of their opening four games since 1986 - when Ron Atkinson was sacked and replaced by Sir Alex Ferguson.
Mourinho's side travel to Burnley on Sunday after two consecutive defeats in the Premier League.
Mourinho said: "We know that in the Champions League, we have to play the biggest candidate". We are the last team in England to win a European competition.
Man Utd are set to recall Eric Bailly, Juan Mata and Anthony Martial after they were left out of the squad against Tottenham while goalkeeper Sergio Romero is also expected to return to the bench after overcoming a knee injury.
"I can tell you 100 per cent, he'd have gone into the dressing room with all the players in training and laid it on the line".