It is quite clear that Chelsea want to sign a new striker this summer. The problem is the two players who seem to be their main targets are not going to be easy to land. Napoli’s Victor Osimhen has been heavily linked with a move to Chelsea, but it is being reported that Manchester United and Paris Saint-Germain are also keen on the 25-year-old. A £113m release clause that he has in his contract, according to the Evening Standard, means a deal to sign him is going to be a very expensive one. Sporting Lisbon’s Viktor Gyokeres is not going to be cheap either. The Sweden international is also tho…