Blues management aren't seeking a stop-gap and instead are focusing on landing an elite talent for the long-term.
The Daily Mail says three names are being discussed, which vary in age.
Jeremy Jacquet, the 20-year-old of Rennes; Jacobo Ramon, the 21-year-old of Como; and Marcos Senesi, the 28-year-old of Bournemouth are all under consideration.
Senesi is off contract at Bournemouth this summer and also interesting Barcelona and Juventus.