Photo: Diego Costa’s latest Instagram post may worry Chelsea fans

Diego Costa was all smiles as he posed for a picture after having dinner with Atletico Madrid boss Diego Simeone on Monday night.

The picture may come as a worry to some Chelsea fans after the striker was linked with a return to Atletico Madrid in the summer transfer window.

Costa has established himself as one of the Premier League’s top strikers since his arrival at Chelsea from Atletico back in the summer of 2014.

The striker has started this season strongly for the Blues and has already netted nine goals and made three assists in 11 Premier League games this term to help Chelsea up to second place in the table.

The Spain international was all smiles as he posed for a picture with the Atletico Madrid boss, and posted it on his Instagram account.

Costa wrote the caption: “Great reunion and great memories @simeone.”

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Chelsea are currently second in the Premier League table and a point behind leaders Liverpool after 11 games.