The Premier League is only six matches old this season’s title race is set to be extremely exciting.

Both Manchester United and Manchester City have made impressive starts to the campaign as they sit level at the summit with 16 points.

Three points behind them are Chelsea, while Spurs and Liverpool are a further two points adrift. Arsenal are already playing catch-up as they trail the two Manchester clubs by six points.

While it’s still very early days, many believe that the title will be contested by the only two unbeaten sides - United and City.

Both Jose Mourinho and Pep Guardiola splashed the cash in the summer and have assembled squads capable of winning the league.

But who will come out on top?

That question was put to Joey Barton when he appeared on talkSPORT radio on Monday night.

Despite being a former City player, he thinks that United have the edge - mainly thanks to Mourinho.

Barton on the Mourinho factor

When asked if he thought Mourinho's United would come out on top, he said: "I do.

"I do mainly because the manager is a serial winner. He knows how to win."

Fair enough.

Barton on the weather

But Barton also has another reason why he thinks it’ll be United winning the league over his former side - the weather.

"Also I think when the cold weather comes and the fixture congestion comes, I think Manchester United have got the physicality to deal with it,” he added.

"If you remember last year City started like a house on fire and then the cold snap comes in. Them South Americans, I’m not too sure they like it when it gets cold here."

Really, Joey?

While Barton’s logic can be questioned, the fact that City have more South Americans in their squad can’t be disputed.

Guardiola has four Brazilians in goalkeeper Ederson, Danilo, Fernandinho and Gabriel Jesus. They also have two Argentineans in Sergio Aguero and Nicolas Otamend as well as Chilean Claudio Bravo.

As for United, they have just three South Americans with Argentinean duo Marcos Rojo and Sergio Romero and Ecuador's Antonio Valencia.

We’ll just have to wait until the winter to see if Barton’s theory comes true.