Real Madrid and Espanyol have a really good relationship and every year both clubs interchange some players. This summer, for instance, Los Blancos signed Lucas Vázquez and Kiko Casilla after their good performance at the Barcelona club.
Los Periquitos have targeted three other madridistas for the next season: Marco Asensio, Diego Llorente and Kiko Casilla.
Diego Llorente played for Rayo Vallecano this season, showing a great performance, either as a full back or as a stopper. Rayo Vallecano is about to be relegated to the Second Division but Llorente is a top division player. Both teams are already talking and are about to reach a deal.
Marco Asensio has a different situation. The player arrived last year to Real Madrid from Mallorca but left on loan to Espanyol. He played a really good season at Cornellà and the club would like the player to stay another year on loan.
It will be more difficult for Espanyol to get the other player targeted. Kiko Casilla has been on the bench the whole season but he did a good job every time he had the chance. For instance, he played against Valencia in the last game of the season at Bernabéu Stadium and was the best player on the pitch. If De Gea arrives to Madrid, Casilla is expected to leave the club and Espanyol could be a good option.