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Diego Costa and Nemanja Matic both left off of Chelsea's preseason squad

Diego Costa and Nemanja Matic both left off of Chelsea's preseason squad

It came despite winning the Premier League title together last season with Costa playing a pivotal role in that success, but also after months of speculation linking him with either a return to Atletico Madrid or a move to China, as reported by The Sun.

The Premier League champions were dealt a blow last week when they were beaten to the signature of Romelu Lukaku by Manchester United, who are still understood to be keen to sign Chelsea midfielder Nemanja Matic.

"Roma is a big club too... in Italy, but I think Chelsea is a different level".

Meanwhile, the club have confirmed that Brazilian striker, Lucas Paizon has been loaned to Championship outfit, Fulham FC for next season.

Sports Mole's countdown of the top 25 Chelsea players in the Premier League era continues with number 21 - Diego Costa. You need someone who's capable of holding the ball up and can finish.

The Spaniard revealed earlier this summer that Antonio Conte had text him to inform him that he no longer formed part of his plans moving forward.

According to the latest reports from The Sun contract talks between Conte and Chelsea have hit a stumbling block with the Blues boss growing increasingly frustrated with how the summer transfer window has panned out so far. Monaco midfielder Tiemoue Bakayoko appears to be the club's third signing ahead of the 2017/18 season, but an official deal with the Blues has yet to be announced.

"But I'm convinced Chelsea know what they are doing and Conte definitely knows what he is doing".