If Diego Costa wants to leave Atletico Madrid for Barcelona, Real Madrid or Sevilla, he would have to pay a £23m fine, according to Cadena Cope.
Costa returned to the club from Chelsea in 2017 and has netted 19 times in 81 appearances so far.
However, the 32-year-old is now behind Luis Suarez and Joao Felix in Diego Simeone’s pecking order.
With his contract set to expire at the end of the campaign, Costa was widely expected to leave in the summer.
But the player is keen to leave in the January window.
However, Costa has a clause in his contract whereby he would be forced to pay a staggering £23m if he were to join any of the three elite teams in Spain outside Atletico: Barca, Madrid or Sevilla.