Manchester City are interested in Cagliari star Radja Nainggolan.

The son of an Indonesian father, Nainggolan is a Belgium international and enjoying great form for Cagliari since his move last year.

Gazzetta dello Sport says City boss Roberto Mancini is having the youngster watched this season.

AC Milan, Inter Milan and Napoli, which had a €9 million summer offer rejected, are competing with City for Nainggolan.