Next up to face Pep Guardiola’s unstoppable Manchester City team are Arsenal.The Gunners have lost just once in 13 matches in all competitions but they take on a Man City side that is unbeaten in competitive matches since April.Many are already wondering whether Man City will repeat Arsenal’s Invincibles of 2003-04, in which Arsene Wenger’s side cruised to the Premier League title without losing a game.And it’s not hard to see why. City have made light work of their opponents so far, winning nine out of their 10 league matches and scoring 35 goals in the process.It’s taken a year but we’re finally seeing the true effect of Guardiola on a consistent basis. The 46-year-old has turned Kevin De Bruyne into arguably the finest player in England and his impact on Raheem Sterling has been nothing short of extraordinary.If City’s form wasn’t enough reason for Arsenal to be concerned, the following stat definitely is:

Add in the performances of both sides in Europe this week and it’s no wonder City are the heavy favourites heading into Sunday’s game.

Wenger played a weakened side against Red Star Belgrade, admittedly, but he will have expected his team to find a way through in 90 minutes.

A journalist has a theory about Guardiola

But in the eyes of a journalist who covers Man City, it’s something else entirely that’s given him reason to believe the table-toppers will come away with three points this weekend.

Sam Lee, a correspondent for Goal, has noticed that Guardiola is usually tense and grumpy in press conferences before a tough game. When he’s confident that City will win, however, he’s more open and chirpy with journalists.

“Theory: Guardiola's grumpy in pressers when he knows next game is tough, but happy/open when he's confident City will win. Was v open today,” Lee wrote on Twitter.

“Have thought this for a while now, probably since before the home game against Monaco. No doubt this'll be retweeted when Arsenal win.

“A lot's been written about how he has this moment of clarity, of how he's going to win a game. When he doesn't have that he's more tense.

"So if he's tense about how to win the game, in the press conference he comes across as grumpy, as it's basically a waste of time for him.

“But if he thinks 'we can hurt them here, here and here, we just have to do this, this and this', he's more relaxed and ready to speak.”

It’s an interesting theory. Indeed, Guardiola appeared more irritated when he spoke to the media before City played Chelsea in September, although Sergio Aguero’s car accident probably played a part in that.

For those interested, you can watch Guardiola’s entire press conference ahead of the Arsenal clash below.