Chelsea's Diego Costa parties in Atletico Madrid jersey

The Blues are struggling to reach an agreement with Juventus over Alex Sandro

Earlier in the summer, Costa was told by boss Antonio Conte in a text message that he was no longer part of his plans and he soon flew to Brazil to be with family.

Costa has had a fractious relationship with the Chelsea manager since the Italian's arrival in West London and looked destined to leave in January after his attitude was questioned amid interest from Chinese club Tianjin Quanjian. The 28-year-old has been accused by the pundits of diving on many occasions, the referees tend to reach for the whistle every time he hits the deck; it has led to a sorry end for the former Brazilian worldwide.

He appears to chant "Aupa Atleti" in the clip - in support of his former club.

Costa's Instagram post got weirder when Cesc Fabregas, a Chelsea teammate got involved.

Costa then responded to his fellow Spanish worldwide by telling him to "give Costa a hug".

Not to be disrespectful, but when you speak about Roma and Chelsea, Chelsea is a big club.

In the mean time, Costa is seemingly intent on burning all of his bridges at Chelsea - which probably isn't the most mature manner in which to go about business.

And a third commented: "Good riddance..."

I'm not sure if Conte would want him back after this incident. "No U-turn, thanks for coming, bye".

With Diego Costa's future still to be resolved, Chelsea's striker problem is growing, and whilst splashing out for Morata would please Conte, it may not be what the club want.

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