City are currently six points behind leaders Liverpool with a game in hand ahead of Sunday's clash with Crystal Palace.
However, the Argentine is confident that the Premier League race is far from over.
"We still have four games to go until the end. It's going to be tough, but we need to keep believing. We know in football that anything can happen," he told reporters.
"We have put pressure on Liverpool. We now need to wait for Liverpool to drop some points, which they can do in some games. We must move on to the next game and get three points at Crystal Palace.
"Nothing is over. In football, you know anything can happen. The most important thing is to keep working hard, keep doing everything possible until the end and then we will see."
Liverpool host Chelsea prior to City's clash with Palace.