Manchester United veteran Gary Neville is remaining extremely cautious of rivals Manchester City.

The 35-year old defender knows that Roberto Mancini's squad is extremely strong and can see them as being genuine title contenders this term.

"Last weekend's results mean we are now behind Manchester City in the league, which hasn't happened too often in the past 20 years," he told the Sunday Times of Malta.

"There is no doubt that we have to see City as major challengers this season along with Chelsea.

"At the moment, City and Chelsea are above us and the money that City have spent, and the quality and depth in both squads, means we have to see them both as rivals for the title."