West Ham United co-owner David Sullivan fears losing midfielder Alex Song to a foreign club in the summer.
Song is on-loan at West Ham this season from Barcelona.
Sullivan told the London Evening Standard: "At the end of the season we will look at things. It might be he has higher aspirations than us but he may love it at West Ham. I know him and his wife love London. It's very premature to talk about what we will do - I think you must look at it later in the season.
"We'd love him to stay but maybe a club in Turkey will offer him a crazy salary tax-free. It's hard to compete with that financially if the player is willing to play in Turkey or Russia."
