Even though his current contract runs until the end of June 2019, the Telegraph believes that Diego Costa could leave the club this summer.
Therefore the Blues are looking for an adequate substitution, in the case the forward accepts one of the offers from China or other big clubs.
The first possible target is Romelu Lukaku. He knows the club and the Premier League very well, as he played from 2012 until 2014 for them, even though he spent a time on loan at other clubs. He is currently one of Everton's top goalscorers and his coach wants to keep him. However, a high bid could make him change his mind.
Real Madrid's Alvaro Morata could subsitite him as well, as he is one of Antonio Conte's favourite players. Both of them worked together and the Spaniard could bring more movement to Chelsea's attack.
The last one on the list is Alexis Sanchez. His current Arsenal contract expires next year and his extension seems to be far away. He is a keyplayer at Arsenal and could have the same role at Chelsea.
Three contenders for one place. Who would be the right one in your opinion?