"There are two clubs interested in signing Zoltan, but their approaches aren't official ones," his advisor Vladan Filipovic said.
"I and the player may connect with them if West Brom accept the approaches and then we can start talks.
"The main teams are the ones that showed interest recently. The clubs are Aston Villa and Tottenham Hotspur, but they haven't made anything official.
"Zoltan's value has doubled since he joined West Brom thanks to his amazing first year."