The 27-year-old was stabbed during a robbery last week in Liverpool.
"Definitely not for the weekend and I don't know at the moment if he will play [again] this season," Cocu said.
"It could be but maybe not. It is up to him and it depends on his recovery.
"Not only does he have to recover from his wounds, although he needs time for that, but also the mental impact of such an event, which is quite big."