Jose Mourinho's Red Devils set up to defend at the Etihad Stadium and it proved that way with City having 19 shots on goal to United's three.
But Guardiola was respectful of the way United performed in a match he truly believes they set out to win, as just like City, they are chasing a top-four finish.
"I'm pretty sure United came here to win the game because I've never met an opponent who wouldn't want this result," said Pep.
"We tried to have the ball and attack like we have tried to do all season. Today it was much harder against a team who haven't lost in 23 - it was not easy but we tried. It's one point and the fight keeps going."
He added: "In my career I have come across many different styles. I am going to be respectable for my opponent's style. We did absolutely everything to win and tonight it wasn't enough.
"The better result, of course, would have been to win the game. We have five games left, three at home and two away and we have to keep fighting.
"We are going to try the way we have played tonight - creating many chances to score goals and hopefully we can qualify for Champions League."