The Spanish international was not included in the Blues’ squad for European competition this season – although those lists can be amended if need be after the group stages.
However, it is expected that Diego Costa will be completing a move away from the club in January – having been chasing a move back to former side Atletico Madrid throughout the summer.
The striker is still back home in Brazil and refusing to train for Chelsea, but being included in the Blues’ Premier League squad had given some faint hope that the Spanish international may still be used at some point at Stamford Bridge.
However, the omission from the Champions League squad seems to be a clear statement – and Chelsea fans have reacted as such on Twitter.
What do you make of the Diego Costa situation? Let us know your thoughts in the comment box below.