Sol Campbell says the squad depth of Manchester City is the only thing that could stop Arsenal from winning this season's Premier League.
The Gunners face City in a crucial fixture at the Emirates Stadium on Monday as they continue their bid to end a title drought that has run since the Invicibles team of 2004, of which Campbell was a part.
Arsenal are sitting two points behind shock leaders Leicester City after 16 games, with Manuel Pellegrini's men a further point back in third place.
Manchester United and Tottenham round off the top five, but Campbell – who played for Arsene Wenger's men between 2001 and 2006 prior to a second spell in 2010 – is only worried about City.
"City have the bigger squad and when injuries kick in they will have depth," the 41-year-old told 888 Sport.
"That is the only thing that could halt Arsenal – the depth of City's squad. When everyone is getting tired come February they will have impact players who can come on and make a difference. That is the only thing I am worried about.
"I would love them [Arsenal] to do it, but I don't like tipping people too early. But if they are going to have a chance to win, it is definitely going to be this year.
"Sometimes opportunity knocks and they are responding. The best chance they have got is this year."
