Arsenal are eyeing Wolfsburg midfielder Luiz Gustavo.
Kicker says the midfielder has a buyout clause in his Wolfsburg contract that would allow him to leave for a 'big' club after the tournament.
Wolfsburg sporting director Klaus Allofs refused to reveal any details of the clause, but said: "Even at VfL [Wolfsburg] nobody is unsellable.
"For me it is important that we show [players] that we are willing to negotiate if an offer is made that is reasonable in a sporting sense and also makes good business sense for VfL."
Barcelona are thought to be readying a bid but Arsenal could also rekindle their interest as they look for another defensive minded midfielder.
