Guardiola’s quadruple-chasing City were due to play Neil Warnock’s side on April 6 or 7 but the game has been re-arranged after they beat Swansea at the weekend to reach the FA Cup last four.
They will now face Brighton at Wembley on that weekend instead and the league game against the Bluebirds will take place on April 3.
The Daily Star claim Guardiola is angry as he believes it could give Liverpool the edge in the race for the Premier League title if he is forced to make widespread changes to his team.
City remain favourites despite being two points behind their title rivals as they have a game in hand.
However, one single slip-up could be enough to hand Jurgen Klopp’s team their first title in 29 years and Guardiola is said to be concerned.
Incredibly, City are favourites to win all of the three competitions they are currently still in.
Guardiola has already led them to the Carabao Cup and is looking to become the first manager to win four major trophies in a single season with an English club.
However, he moved to play down talk of an historic quadruple when quizzed fowling the Swansea win.
“Ask me at the end of April [about quadruple] and I will answer you,” he said.
“I want to congratulate the players and staff for being here at this stage. I am already satisfied.
“I know for the people it will be a big failure if we don’t win three or four titles, so I’m sorry!
“Now we are going to fight every game after the international break.”
Liverpool boss Klopp is hoping to dent Guardiola’s hopes and has previously insisted they are going nowhere in the race for the title.
After his side beat Fulham 2-1 to go top at the weekend, he said: “We want to stay in the race. That’s what we did.
“We want to stay in the race. That’s what we did.
“(First is) the best position you can be in. City don’t look as if they drop a lot of points, so we have to win, to win and to win.
“Now they have a game in hand but it was very important we won. We were really all very happy. You could see in our reaction.