Everton have rejected an enquiry from Sunderland to include Phil Jagielka as part of a deal for Lamine Kone.
Sources told ESPN FC on Tuesday that Everton are in advanced talks with Sunderland defender Kone, who is wanted as a replacement for John Stones.
Everton have already agreed a deal for Swansea and Wales captain Ashley Williams and Toffees boss Ronald Koeman hopes to also bring in Kone to strengthen his defensive options.
The arrivals of Williams and Kone would increase competition for places in Everton's defence and Sunderland have made an enquiry about Jagielka's availability.