Radja Nainggolan admits he could leave AS Roma.

The midfielder is co-owned by Cagliari and is frustrated by negotiations over an outright deal.

“Everyone knows that I want to stay at Roma," he told reporters after a Euro 2016 qualifying defeat to Wales.

“But there's nothing more I can do. They have to get on with it."

Asked about Juventus, he added: “Juve? It's a great team, but I am happy at Roma.

“If my price-tag has reached certain figures, there must be a reason…"