Everton boss Marco Silva has confirmed Manchester United are not the only club chasing Richarlison.
The 22-year-old, who joined the Toffees from Watford during July 2018, has been linked with a move to Old Trafford.
Director of football Marcel Brands said on Everton TV: “We have to look positive ahead, and I try to do that always.
“One of the positive things during a week like this which happened is we are now busy with the last details of extending the contract with one of our key players Richarlison until 2024.
“That is something positive, especially for the long-term of course.”
The deal has yet to be officially announced, and under-pressure Silva admitted there is significant interest in the forward, who has scored six goals this season.
The Everton manager said of interest in the player: “I believe it is not just Manchester United. I believe it is some more.
“As a club we have to keep our best players. Unfortunately we did not keep one of them in the summer [Idrissa Gana Gueye] but to keep growing and going in the right way we want our most important players, our best players, and we should keep all of them. Then we can keep growing.
“We don’t see other clubs who want to grow selling their best players. That is what we should do.”
In June, Richarlison said he was flattered by speculation linking him to United and Barcelona, though he was not thinking of leaving Goodison Park just yet.
“It’s a nice feeling when you get praise for your good work, but I’m not thinking about a transfer at the moment. I’ve just arrived at Everton. I’m happy here,” Richarlison told reporters.