There has been talk that the Spaniard ordered City groundstaff to grow the grass extra-long in a bid to stifle Liverpool's quick-passing game.
"I'm not the groundskeeper," said Guardiola. "I never did. If they want to play quick, we want to play quicker. We always try to put water on, but it's not necessary here.
"We want to cut the field - it's better conditions for both teams. When this happens, you do the best for opponents.
"We have to respect them with the rules. I never speak with the groundsman.
"I have many issues to think about that. I trust the groundsman - I never made a phone call to say do this to damage our opponents. When you do that karma tends to get you."