Roma boss Luciano Spalletti has hailed the form this season of Radja Nainggolan.

The midfielder has been in sensational form in recent weeks, with five goals and two assists in his last six games.

“It's hard to find adjectives for him, to make comparisons," Spalletti said in his pre-Lazio Press conference.

“He might be the evolution of the footballer species. If you had 10 Nainggolans you'd have a very strong team, regardless of the role.

“Nainggolan adapts to anything. If I ask him to do something, he absorbs it and then he goes and does it. If you ask more from him, he'll go even further.

“It's like having 10km worth of petrol, then he gives you a reserve to go an extra 2km and refuel. If you put him in front of the defence, he doubles the quality there, he can adapt to many other roles.

“He can shoot, as we saw on Sunday, as well as chase down a man on the edge of the area. Usually if a player does one thing, he can't do another.

“He can dribble, he can run down 10 players… he's a rare beast."