The youngster has been in scintillating form this season and he is now on the verge of becoming a first team regular.
The 21-year-old is considered an important member of the side at Camp Nou, but El Mundo Deportivo understands that he could easily leave the club in the summer.
Namely, even if the player renewed his contract in December 2012, his release clause stands at mere €10 million, meaning he is well within the price range of top European clubs.
Under the terms of the contract, the clause will increase to €14 million once the player has played at least 25 minutes in 51 official matches, but having played just 26 of these, Tello will be available for €10 million in the summer.
One of the interested sides are likely to take advantage of this excellent opportunity and match the buy-out clause, although they would still need to persuade the player to leave Camp Nou.