The tie was played with the Mitre Delta EFL, which is different to the Nike Ordem V ball used in the Premier League. Guardiola refused to blame the ball for the performance but he was unhappy with it.
"It is not acceptable, the ball was unacceptable for a high-level competition," he told a news conference.
"It is too light, it moves all over the place, it is not a good ball. It is impossible to score with a ball like that and I can say that because we won, I'm not making excuses.
"All of my players said 'what is that?' I'm sorry Carabao Cup is is not a serious ball for a serious competition. It's marketing, money, ok but it's not acceptable, no weight, nothing.
"One day or two days, but the ball is bad for one year or two years, it's not acceptable. all the players complain."
個波好似唔掂