Arsene Wenger believes that teams are more physical than they used to be - meaning possession does not always win.
And that is why he thinks more teams are enjoying success on the road this campaign.
Wenger's Arsenal teams have bossed the possession statistics over the past 15 years of the Premier League and have enjoyed relative success playing that way.
The Gunners enjoyed just 37 per cent of the ball in their 2-1 win over Manchester City on Monday night.
And across the Premier League, teams enjoying less possession of the ball are winning more often this season.
Throughout the 2015-16 season, the average possession of the team that goes on to win a game of football is just 49.2 per cent - a significant drop from the 52.8 per cent in 2011-12.
"It looks like it is linked with a trend that possession is not rewarded any more like it was before," said Wenger.
"This is the first year that possession does not give you the win like before. Teams are better organised, better prepared physical, in the last 20 minutes.
In pictures - Arsenal 2-1 Manchester City:
"Now teams play with the same ability in the last 20 minutes, fatigue is playing less part.
"The transition from defence to attack has also become much better."
But while Wenger admits that the game is changing and he is forever learning, he has revealed that he will not be making drastic changes to what he does.
He said: "I keep my philosophy, but I’m also an observer. Like you I try to understand something new."
