Roberto Martinez labelled the decision to allow Manchester City’s second goal in Everton’s League Cup semi-final defeat “heartbreaking”.
Everton, holding a 2-1 lead from the first leg, were beaten 3-1 at the Etihad, despite taking the lead through Ross Barkley’s strike.
Fernandinho quickly responded for City, but controversy surrounded Kevin de Bruyne’s goal, which leveled scores on aggregate.
Replays confirmed Raheem Sterling ran the ball out of play before cutting the ball back for De Bruyne to finish.
“It was a good game of football, we scored the first goal, got in a great position. It was a big call for their second goal, heartbreaking, when you watch the replay it is incredible you don’t get the decision right,” Martinez told Sky Sports.
“It is impossible how you describe when you saw a decision once more, so clear and so big, it is heartbreaking, I don’t think anyone in the stadium would disagree that goal is the major, major change in the tie.
“In the replay it doesn’t leave you with any doubt, the ball is clearly out and should never be allowed to carry on.
“We should take this as an inspiration to do something special because that call cost us. We played with an incredible swagger and character.”
City secured the 4-3 victory on aggregate through Sergio Aguero’s 76th-minute header.