The Toon lost 2-0 to Manchester City in extra time, with goals from Alvaro Negredo and Edin Dzeko sealing City’s place in Round 5 of the competition.
It was a tough blow for Pardew, who had watched his side battle to finish the 90 minutes level with high spending title contenders. And the former West Ham and Charlton manager was left thinking of what could have been after striker Papiss Cisse failed to convert a golden opportunity with the game at 0-0.
“If that goes in it could’ve been different,” Pardew told Sky Sports.
“I think it was obvious the first goal would be crucial and they got it. David Silva had a big influence when he came on but before that I thought we were the better side.
“I’m disappointed for the fans and our players because they put on a terrific show after the disappointment of Sunday. It was just a shame we couldn’t get the goal we deserved.”
The Toon were looking to bounce back from the disappointment of losing the Tyne-Wear derby on Sunday, and were left having to grasp for the positives after now going three games without victory.