They all said Klopp's training revolved around two words: intensity.
Every part of his training plan was built around one goal: match conditions.
To make his players always run one step farther and move one second faster than their opponents on the pitch.
Within Liverpool, there was a saying called "Hell Monday."
It meant that the first training day after every matchday was the most intense.
But in truth, that was only the case at the start of the season, or during weeks with only one match.
At present, Liverpool were playing two matches almost every week, so it was simply impossible to maintain that kind of training schedule.
Therefore, Klopp's training had also shifted from hardening the players to recovery.
Each day's training session remained at roughly ninety minutes, but the intensity was lower than usual. There was more emphasis on strength work in the gym to maintain fitness.
Moreover, Klopp also conveyed his tactical intentions through tactical meetings and one-on-one conversations.
At that moment, Klopp was in his office speaking with the young Arnold.
"Alexander." Klopp sat behind his desk and looked at the nineteen-year-old before him. "Your biggest weakness right now isn't your tackling technique. It's your gambler's mentality when it comes to defensive positioning."
Arnold paused, then listened carefully.
"You rely too much on your explosiveness when you go in for a tackle," Klopp said, gesturing continuously with both hands.
"But in the Premier League, speedy wingers will use changes of pace to beat you a hundred times. You can't always expect that one tackle to solve the problem."
He picked up a USB drive from the desk and handed it to Arnold. "This is footage Peter specially edited for you—footage of Kyle Walker."
Arnold accepted the USB drive and lowered his head to look at