Barcelona's board is nervous over Manchester City's interest in Lionel Messi.

Don Balon says they fear Messi could join Manchester City this summer.

Messi's contract expires in 2018 and he is yet to sign an extension.

And the Catalan giants are worried he could make the move to the Etihad Stadium.

Pep Guardiola is willing to offer him wages of £33million a year to leave the Nou Camp.

Messi is said to be keeping his options open and a summer switch has not been ruled out.