"There's not just Andy Cole, there's people like Dwight Yorke and the gaffer who all of us look up to," O'Donovan, who signed for Sunderland earlier this month from Cork City, told the Northern Echo.
"Dwight and Andy were unbelievable together at Manchester United. They were an unbelievable partnership, the best in the Premier League's history when they played together.
"Andy is someone else that I can learn from.
"For someone at 22 years of age, to have an opportunity to work with people like Andy Cole and Dwight is fantastic. I could take something from everyone here really, though.
"I was a big fan of Roy Keane, he was a great footballer and one of the best. But when you come to the Premier League you are going to be working with players and people of that stature all the time. You have to get used to it fairly quickly."