The 42-year-old Englishman was a Tottenham player for nine years before controversially moving to neighbours and bitter rivals Arsenal in 2001 and establishing himself as a Gunners legend over a five-year spell which included the 2003-04 "Invinvicibles" campaign.
Arsene Wenger's side currently top the table alongside Manchester City and Liverpool on 23 points, however a run of four straight league wins for Chelsea has seen them climb into fourth place and just a point behind that trio.
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Across those wins, Antonio Conte's men have scored eleven goals but, crucially, conceded none, and it's the latter statistic which Campbell feels gives Chelsea the edge when it comes to pipping their title competitors.
The Blues produced an impressive display to earn a 2-0 victory at Southampton on Sunday, and when speaking about them, the former centre-back told the Premier League's Matchday Live, via The Sun: "It's very professional. Tight at the back, that's key.
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"Look at Leicester - how they won the Premier League last year, very tight at the back, nicking goals. Okay, they are not just nicking goals, Chelsea, they are dispatching teams as well. But being tight at the back."
Campbell continued: "And that's the right balance, really. The right cocktail, balance, if you need that solid (defence), in those tight games, back end of the season, last day, six, seven, eight games, that will kick in and make the difference."
Conte's switch to 3-4-3
Only Spurs and Everton have conceded fewer goals than Chelsea in the league this season, and much of that is to do with Conte's recent formation switch which suits his tactics down to the ground.
Following their comprehensive 3-0 loss away to Arsenal last month, the Italian decided to revert to his favoured system of three defenders, something which he enjoyed tremendous success with both at Juventus and the Italy national team.
It's given striker Diego Costa and star man Eden Hazard the freedom to fully express themselves going forward, whilst summer signing David Luiz has the extra insurance of a central defender either side of him.
Chelsea will look to keep up their strong defensive record when they welcome 6th placed Everton to Stamford Bridge on Saturday evening.
Do YOU agree with Campbell? Who do YOU think is best-equipped to win the title? Have YOUR say in the comments box below!
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