Silva has warned that despite big clubs no longer being in the competition City still face a battle to win their first Champions League title.
The iconic midfielder, who is set to leave the Etihad this summer, told the Evening Standard: "The fact that Liverpool are out, Real Madrid are out, it's not going to make our path easier. That would be a wrong thought.
"We need to go game by game, be very focused, knowing that every game is going to be very tough.
"All the teams in Lisbon are here because they deserve it. We need to be at our best level to win the games and try to reach the final."