Ljajic tried to tempt Kolarov
Kolarov has previously spent time in Serie A, taking in three years at Lazio prior to completing a switch to Manchester City in the summer of 2010.
He has toasted two Premier League titles and a FA Cup triumph at the Etihad Stadium, but has also been regularly linked with a move away from the club.
His Serbia international colleague Ljajic attempted to force the issue during the recent transfer window, with Roma eager to add to their title-chasing ranks.
The 23-year-old saw his calls fall on deaf ears, though, as Kolarov remained loyal to City and penned a new three-year contract in June.
Ljajic told Roma Radio: “This summer I tried to convince Kolarov to come to Roma, because he is really strong.
“But I’ve been unable to convince him. I’m sorry, because I would have really liked to have him here.”