United hold a one point advantage over their rivals at the top of the table but saw their four point gap cut down as City sent a clear message to Sir Alex Ferguson’s team with a 2-1 win over Chelsea at the Etihad Stadium on Wednesday.
With nine games of the season remaining, many observers believe that the title race will be decided by the game at the Etihad Stadium on April 30.
City appear to hold the upper hand after setting a new Premier League record by winning 20 consecutive league games in front of their own fans, but Nani says his side have the belief to go there and come away with maximum points.
“It’s very, very difficult to go there with so much to play for, but if you want to win the title then you have to believe you can go anywhere and win – and we have to believe we can do that otherwise you have no chance,” the Portuguese international told Sport Magazine.
“Do I believe we can go there and win? Yes, because it’s on the fixture list in black and white, so we have to believe we can win. Otherwise, well what would be the point?”
United have upped the pressure on City in recent weeks, and have win eight of their last nine league outings having not tasted defeat since they came unstuck against Newcastle in January.
City landed a huge psychological blow early in the season as they recorded a 6-1 win at Old Trafford back in October, however since then Ferguson’s side have claimed a 3-2 win at the Etihad Stadium in the third round of the F.A Cup.
Nani insists he will thrive in the game with so much riding on it, and says he is desperate to start against City having missed out in recent weeks through injury.
“I feel I can enjoy all the games against City because there is a good atmosphere and for the players that gives you more motivation," he added.
“You want to play, you want to feel it and you want to win, so yes-there is pressure but for me it’s nice.”