The Argentina midfielder is expected to leave for the Middle East after the Europa League.
But Kounde told Marca: "I'll tell you one thing [laughs]. After the game against Wolves, I said to him: 'Stay here - if you want, I'll give you part of my salary to get you to stay'.
"He's such an important player for us. He likes the big games.
"It would be a good farewell to leave with this trophy because he deserves it."