Marco Silva wants to keep Kurt Zouma and Andre Gomes at Everton beyond this season.
The duo have impressed during their season on loan from Chelsea and Barcelona, respectively.
Silva said on the futures of Zouma and Gomes: "There's always a chance but it's not something that is just in our hands.
"They are happy here which is a good sign, that means they are performing, they are enjoying and they are helping us.
"We are happy with them, it's up to us to do what we can to keep them and it's up to the clubs, also. And it's up to them, it's not just in our hands.
"It's in the players' minds and decisions after their own clubs. They have to decide together. In the right moment, we'll do something."