AS Roma sports chief Walter Sabatini has cast doubt on keeping hold of Simon Kjaer.

The defender was signed on loan with an option to buy from Wolfsburg over the summer.

"Kjaer has been a little bit unlucky," director of sport Sabatini told the Gazzetta dello Sport.

"He is a player who will require an important economic sacrifice in order to buy out his contract. Therefore, we'll have to wait and see."