Man City boss Mancini would love to sign Barcelona defender Marquinhos
The Sun says Mancini faces competition from Barcelona for the 18-year-old Brazilian defender.
And the Italian - who is also waiting for news on his swoop for Shakhtar Donetsk's Samba star Fernandinho - admits it will be tough to persuade Roma to do business.
He said: "Marquinhos I really like - but I do not think that Roma are willing to sell.
"With just two signings next year, Roma can win the league title."