Casemiro has called on Barcelona forward Neymar to controversially cross the El Clasico divide by joining him at Real Madrid this summer.
The 25-year-old is reportedly considering his future at Camp Nou after being the subject of interest from Paris Saint-Germain, who are willing to spend £192m to trigger his buyout clause.
Barcelona defender Gerard Pique appeared to confirm that the Brazilian will remain in Catalonia by uploading an image on social media at the weekend, which he simply captioned 'he is staying'.
Neymar has yet to officially commit himself to Barca, however, and international teammate Casemiro says that the former Santos ace would be more than welcome at the Bernabeu.
"It is up to Neymar himself to decide his own future," he told reporters. "He knows what he must do. Why could he not play here at Real Madrid? He would be welcome here with us."
Neymar scored twice for Barcelona in their 2-1 win over Juventus in Sunday night's friendly at the MetLife Stadium in New York.