Beckham claimed that players did not "do as much conditioning work at Madrid as we did at Manchester United".
Perez agreed, telling the Daily Mirror: "Yes, we understand Beckham's concerns. We agree that the training was not up to it and that the organisation of the team was not right. We will put that right next season. But who was it who did not train at all during the Christmas break?
"Who keeps flying back to England when he is asked to rest? Who has to take responsibility for that?"