Chelsea after the sanction have a lot of money to spend in players and they probably are looking for a striker and a left back.
After reading some articles, Inter has some interest in Marcos Alonso. To replace him i think what Alex Telles can be a very good option after seeing some Oporto matchs. Very good sprint, crossing and defence, a very complete left back.
For a stiker probably Dries Mertens should be a very good option if he dont renew whit Napoli.