AS Roma director Walter Sabatini says they're close tot signing Radja Nainggolan outright.

The midfielder is in co-ownership with Cagliari.

Sabatini said, "We are evidently getting closer to an agreement, but it is a complex negotiation process. That's a good thing, as it means he's a very talented player.

"With Victor Ibarbo and Davide Astori there's a free option to buy and they are going through their season. It's a complex operation and is also tied in with Nainggolan."