The Frenchman takes a scientific approach to choosing his side, but it's a long process.
Wenger is credited with bringing a scientific approach to the game since arriving in north London, revolutionising not only the Gunners but English football as a whole. It now transpires he uses that scientific approach for team selection as well.
“I always have eight or nine players of my team in my head the day before the game, but there’s always a doubt on one or two,” said Wenger.
“You try to make it as scientific as much as you can, but it’s intuitive as well because you have to think if the balance of the team is right or if one player was a bit better in the last training session.”
The Gunners take on Liverpool this weekend in a crunch tie at the top of the Premier League, with both sides looking to secure their place in the Champions League for next season.
However, the Gunners might have their sights set higher than that, given that they are just one point off second-placed Manchester City with eight games remaining. In contrast, Liverpool are five points behind fourth-placed Manchester United and need to return to winning ways after last week’s defeat to the Red Devils.
Wenger, though, is likely to be considering his team selection right up until Saturday morning, just like he does every week.
“You always have your team in your head, for the whole week. You never go to bed without thinking about what the next line-up will be,” he added.
“You live with that always. That can create uncertainties, because you think about it every day. If you don’t know on Friday night, you will not know on Saturday morning so you have to decide in your head early, and go for it.”