The English Football League will discuss Pep Guardiola's criticism of their Mitre ball with him after the Manchester City manager claimed it was "unacceptable".
City and Championship club Wolves played with the Mitre Delta ball in Tuesday's Carabao Cup tie at the Etihad Stadium, when the hosts needed a penalty shoot-out to advance to the quarter-finals with the match goalless after 120 minutes.
Speaking after the game, Guardiola, whose team play with Nike and adidas balls in the Premier League and Champions League respectively, lambasted the Mitre Delta, suggesting it was "not a serious ball for a professional game".
The EFL released a statement on Tuesday defending the ball and adding it would converse with Guardiola over his complaints.
The statement read: "The Mitre ball used in this season's Carabao Cup is of exactly the same technical specification as the balls used in the Sky Bet EFL and Checkatrade Trophy, all of which are tested in accordance with the 'FIFA Quality Programme for Footballs' and meet the 'FIFA Quality Pro' standard.
"All balls used in the professional game are required to meet this standard.
"Clearly, preference is a subjective matter, but overall the entertainment provided across last night's round-four ties would suggest that the ball used is not having a negative impact in the competition.
"We will look to engage with Mr Guardiola and Manchester City to fully understand any concerns in advance of their round-five tie."
Though City and Wolves are their respective division's top scorers – an honour Wolves share with Hull – neither could register a goal in normal or added time before the hosts won a shoot-out 4-1.
City boss Guardiola said after the match that the ball 'is not acceptable to play with at that level', adding that it is 'not a serious ball for a professional game'.
The Spaniard's sentiment was echoed by midfeidler Yaya Toure, who even claimed the Delta did not compare favourably with adidas' much-maligned Jabulani, which was used for the 2010 World Cup.
"I don't like it, to be honest," Ivory Coast midfielder Toure said.
"They can do better than that. It's too light. Even in my country they can't use those kind of balls.
"I think they have to be better than that because the ball was too soft. It's rubbish but that's fine.
"The World Cup one [Jabulani] was better than that one.
"A lot of players were complaining. The FA can try to do something because we just want to enjoy it.
"It's difficult to play with these kind of balls but we try to find a way. It's everything. Shooting – the ball is very light, when you touch it, it's floating, it's rubbish. And in this weather it's difficult."
The ADIDAS Jabulani ball was widely panned by players, coaches and pundits at the 2010 World Cup in South Africa