Diego Costa has completed his return to Atletico Madrid from Chelsea, and with it comes a substantial, potentially off-putting release clause. The Mirror have reported that the Spanish forward's contract includes a €200m buyout, the equivalent of around £175m. If any club wants to sign the 28-year-old in the near future, they may be forced to make him the second most expensive player of all time. Costa, who has not yet played competitive football this season, will join Atletico in January...
Source: 90min.com