Former Roma sports chief Walter Sabatini says Rick Karsdorp shouldn't have gone AWOL.

The fullback has skipped training in recent days as the squad prepares for a camp in Japan. The Dane was identified as the player coach Jose Mourinho told to leave the club after the draw with Sassuolo.

Sabatini told Sky Italia: "What would I have done if it had happened when I was there? I would have found myself in difficulty, not so much for the market but for professional and human reasons.

"Karsdorp made a serious mistake in not making the retreat, a footballer must follow the rules of the group.

"He will be a little upset, but he has no right to escape the rules."