Wesley Sneijder, Edinson Cavani , Andre Schurrle, Daniele De Rossi and Luka Modric are all being linked with moves to Chelsea after Jose Mourinho's return to Stamford Bridge was confirmed.
The Champions league winner with Porto and Inter Milan is set to make some big signings straight away in an effort to put Chelsea at the heart of next season's title race.
Mourinho is believed to be in search of a dominant central midfielder, a striker and a defensive lynchpin with doubts surrounding David Luiz' future.
German international Andre Schurrle's signing is said to be almost a done deal, with the forward expected to arrive for about €20 million.
Daniel De Rossi, who has had a poor season at Roma, is said to be available for a fee of about €15 - 18 million.