Chelsea have been given first refusal to sign Hajduk Split pair Lovre Kalinic and Tino-Sven Susic, say Croatian publication Sportske Novosti.
Split official Marin Brbic confirmed talks are ongoing.
“Yes, we are in London and at the negotiations, I can tell you that. But I do not have anything else to say on the subject.”
Goalkeeper Kalinic, 24, has one cap for Croatia, whilst 22 year old midfielder Susic has made seven appearances for Bosnia.
It is not the first time Chelsea and the Croatian club have done business.
19 year old Mario Pasalic was signed by Chelsea in the summer for £3 million, before immediately being loaned out to Elche.
By Joseph Richardson