The 25-year-old has been ever-present this term and Stoke have conceded just 12 goals in 15 games, the second-best defensive record in the top flight.
The Bosnian told The Sentinel: "As far as I know, it's all speculation.
"It's always nice when the biggest teams in the world are looking at you. It's a compliment, but it doesn't mean anything.
"We keep our feet on the ground here and the manager wouldn't let that change. I have three-and-a-half years on my contract and I am concentrating on playing, staying in the team, and trying to help the team be successful.
"I am happy here so there are no issues with that."