The tenacious midfielder linked up with Rudi Garcia's men in the summer after last season's Sere A runners-up acquired half of his registration from Cagliari for just £7m following a successful loan spell.
Nainggolan has gone on to become a smash hit for the Giallorossi, creating a formidable midfield partnership with Daniele De Rossi and Miralem Pjanic.
The Belgium international's performances haven't gone unnoticed, with Jose Mourinho, Louis van Gaal, Arsene Wenger and Brendan Rodgers all big admirers of the 26-year-old's no-nonsense approach.
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Roma's Nainggolan is a wanted man
However, reports in Italy claim that the Premier League giants will have to splash the cash if they want to secure Nainggolan's signature.
The player is still co-owned by Cagliari, who are demanding £13million for the tenacious star.
Roma are also demanding the same price for Nainggolan, who is open to a stint in the Premier League but would prefer to remain in Italy for the time being.
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