Manchester United have been informed by Lazio legend Pierluigi Casiraghi that Sergej Milinkovic-Savic would be worth a €100 million (£87m/$117m) investment.
The Serbia international is among those reported to be figuring on the Red Devils’ transfer radar as they prepare to make additions in the summer window.
A £52.5m ($70m) deal for Brazilian star Fred is close to completion, with Goal confirming that he is in England for a medical, but further reinforcements in the middle of the park may be sought.
That could lead Jose Mourinho to Italy and Milinkovic-Savic, with the 23-year-old considered to be ready for a big move after three impressive seasons in Serie A.
Former Lazio striker Casiraghi told RMC Sport on the mounting transfer talk: "I do not know if the valuation is right, if I had €100m I would buy him.
"I like him very much, not just from today, he was immediately seen as a great player.
"He is unique, he is [just] 23 years old."
Casiraghi, who spent five productive years in Rome during his playing days, is not the only former Lazio star to have come out in support of Milinkovic-Savic making a big-money switch.
Stefano Fiore has also suggested that the highly-rated Serb can be a bargain for somebody, with €100m no longer an obscene asking price in an inflated market.
He said: "Given the figures that are now involved in football, he is worth the money because of the quality and characteristics he possesses.
"I also watch a lot of foreign football but players like him are not there.
"An auction will open and we'll see what happens, but if a defender can go for €70m [£61m] in England then Milinkovic-Savic is worth much more.
"That said, the market has gone crazy and should return to more normal figures."