However, Nantes boss Ranieri claims Lucas has opted for a different challenge, hinting a deal with United is already agreed.
Lucas Moura is reportedly "angry" with the €40m (£35m, $48m) price tag Paris Saint-Germain have placed on him this month and will plead with them to cut it in half so he can complete his move to Manchester United.
The Brazil global joined Paris Saint-Germain from Sao Paulo for a fee in the region of 40 million euros in January 2013.
The 19-year-old has continued his stellar progress at PSG, where he has thrived beside Neymar, and Ranieri believes he is capable of becoming the best in the world.
GETTYJose Mourinho wants to bolster his squad with attacking options this month
Lucas Moura has also scored four goals in 35 games for his country.
Jose Mourinho is looking to shore up his attacking options and Paris Saint-Germain's Lucas Moura happens to be a target.
United are long-term admirers of Moura, having failed to recruit the Brazilian when he left Sao Paulo for PSG in 2013. The French giants want 40 million euros for the Brazil global, but Manchester United are believed to be ready to offer half that. The former Sao Paulo sensation wants his club to drop their asking price to €20m, hopeful that will tempt United into agreeing to a permanent deal.
The less than favourable reviews of life in England by the Di Maria's are thought to have slammed the brakes on Moura's potential move to United, with Lucas now wanting to stay in Paris with his wife and young child.
Meanwhile, after recently turning 17-years-old, has signed his first professional contract with United.