Everton are determined to keep most their key players at Goodison Park this summer.
Everton have promised Koeman that he will not be under pressure to sell any of their key players, when he moves to Goodison Park.
The Toffees' promise to attempt to ensure that their big stars remain is one of the assurances that is thought to have tempted Koeman away from Southampton.
The Dutchman has had to deal with many of his high profile players leaving St. Mary’s since taking charge.
Koeman is now expected to be announced as the next Everton boss within the next few days, and the Toffees are optimistic at keeping hold of the likes of John Stones and Ross Barkley.
Everton are likely to have to fend off interest in the England internationals, but they are determined to block any bids.
The Toffees are more worried about Lukaku’s future, though, as the Belgian appears to have his eyes set on a transfer.
Lukaku has made a number of comments to the media suggesting that he wants to leave Everton, and although the Merseyside club intend to try and convince that he should stay, they have warned Koeman that the striker could depart this summer.