Eberechi Eze’s 16th-minute goal proved decisive as Crystal Palace secured the first piece of major silverware in their history.
Perhaps the biggest talking point of the game came at the other end of the pitch, however, after Dean Henderson appeared to handle the ball outside of the box, denying Erling Haaland a goal-scoring opportunity.
VAR intervened and decided against giving Henderson his marching orders, something Guardiola seemingly disagreed with, storming the pitch after the final whistle to confront the goalkeeper.
Speaking to the press after the game, Guardiola was in no mood to talk in depth about the situation, simply saying: "Ask the referee."
On why Omar Marmoush took the penalty over Haaland, he added: "I don't know, I didn't speak to them. They made a decision. They decide."