The Belgian midfielder scored on his Serie A debut with his new team, but the coach wants more from him away from the attacking side of his game
Inter coach Luciano Spalletti conceded that he is expecting more from Radja Nainggolan following his move from Roma.
Nainggolan joined Inter in June and was reunited with Spalletti, who previously coached him at Roma.
Inter are reported to have paid €23.5 million (£21m/$48m) plus Davide Santon and Nicolo Zaniolo for the 30-year-old, but he has featured in just one of their three Serie A outings so far.
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He also scored in that appearance against Bologna, but Spalletti wants more from the Belgian away from the offensive side of the game
"Nainggolan is a strong player, as are all of his team-mates, otherwise they would not play here," Spalletti told reporters ahead of Saturday's clash with Parma.