Boca registered Gago for the coming Argentine season, but Marcelo Lombilla insists this means little.
"It is impossible for him to go to Boca Juniors," said Lombilla. "They've made no offer to Madrid and are not close to making one.
"Teams can pre-register players without consulting the club owner or the player himself. It is a right offered by the AFA. If I wanted, Boca could do the same with Cristiano Ronaldo. It means nothing."