The Bosnia & Herzegovina international is being linked with a potential summer move to the Spanish giants and although he is flattered, he believes it is merely paper talk.
"I'm proud to read that sort of stuff, but it's just rumours," he told the Sentinel.
"There's nothing official or any contact with anyone from Madrid.
"It's extraordinary, brilliant, to be linked with a club like that, one of the biggest in the world.
"I'm very happy at Stoke and I have an excellent position here. I only think about my club.
"If you come to me with more than speculation then I'll give you more specific answers in the future."
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