AC Milan are keeping tabs on Radja Nainggolan's situation.

The midfielder is in co-ownership between AS Roma and Cagliari, with talks over an outright deal stalling.

Roma chief Walter Sabatini is attempting to sign Nainggolan, but so far has failed to find an agreement with Cagliari. There is a real danger of the matter going to a blind auction.

Milan are monitoring developments after seeing AS Monaco midfielder Geoffrey Kondogbia sign for Inter Milan.