Red Devils defender feels an open second leg will suit his side at Old Trafford and believes that Fernando Torres was going down "too easily" in first half at Stamford Bridge
The defender returned from a two-month absence to partner Nemanja Vidic in the heart of the United defence and put in a fantastic performance to dent the Blues' hopes of advancing into the semi-finals.
"Of course the job is not done," said Ferdinand. "Tuesday is another game. If it is as open as the first one was maybe that will suit us.
"But we will be setting our stall out to win. We are a positive side. We don't go into matches to draw."
Despite his lengthy absence. the former England captain denied he felt any nerves going into the fixture.
He continued: "I didn't feel any pressure or nerves. You are doing what you love. I wake up every morning wanting to play football.
"To come out and play at stadiums like Stamford Bridge does not make me nervous, it makes me want to try and get the right result for my team.”
Ferdinand came out on top with his clash with Chelsea’s £50 million man Fernando Torres, however, the defender suggested that the Spaniard wasn’t playing by the book.
"In the first-half I felt Torres went to ground too easily," he said.
"But things like that happen. You have to get on with it."
Ferdinand thinks his experience along with the more senior players in the United team is invaluable to Sir Alex Ferguson's side.
"When you have played a lot of games and seen all these situations there are not many surprises in these games," he added.
"I have seen a lot of things and if you can't deal with that at this stage of your career then you never will."
The former Leeds man has come back sooner than expected from injury and he reckons it is important he continues his fitness regime as he has struggled to play consistently for the Red Devils for the last two seasons.
"I was told a certain amount of time and I have come back a little bit quicker," he said. "I was confident I would come back. Now it is about maintaining that."
The former United captain also paid tribute to Edwin Van der Sar and admitted he and his team-mates have tried to stop the Dutchman from retiring at the end of the season.
"There have been a few shouts to try and get him to change his mind but Edwin is adamant," said Ferdinand.
"He has had a fantastic career. Good luck to him in whatever he decides to do."