Robertson spent the majority of his Liverpool career working under Klopp before Slot took over in the summer of 2024. The Scotland international has since left Anfield for Tottenham Hotspur, but his time under both managers has given him a unique perspective on the contrasting methods used by the two coaches.
Speaking on The Overlap, Robertson explained that Slot placed a much greater emphasis on statistics and player workloads.
“Arne was very focused on statistics, that’s what he was,” Robertson said.
“He brought his own guy, Ruben Peeters, who was always sitting with the iPad. Even during training, if you had perhaps done too many sprints or something like that, Ruben could say: ‘Someone might need to come off.’
“They had much better awareness of workload and things like that. He was definitely that way inclined.”
The presence of Peeters was one of the clearest examples of how Slot's methods differed from those of Klopp.
Robertson also described a tactical difference between the two managers. Klopp had largely trusted Liverpool to impose their own approach on opponents, while Slot placed more emphasis on analysing the opposition and adapting accordingly.
Under Klopp, Robertson said, the focus was often on Liverpool's own blueprint and making it work regardless of the opponent.
Slot, meanwhile, encouraged the players to consider how the opposition might approach the game and how Liverpool could respond.
The change in style also contributed to criticism from some supporters, who felt Liverpool were no longer playing with the same intensity that had become synonymous with Klopp's team.
Robertson, however, strongly rejected the suggestion that Slot's players were not working hard enough in training.
“That was probably what annoyed me last season – people saying things like, ‘They don’t train hard enough’,” he said.
“We really trained hard under Slot. Some of Slot’s sessions were incredibly tough.”
Robertson believes the perception was partly created by the contrast with Klopp's methods, rather than any lack of physical preparation.
“It was probably just that people were so used to how we went full out with Jürgen Klopp, whereas Slot’s playing style was probably a little different,” he explained.
Under Klopp, Liverpool became renowned for their aggressive pressing, intensity and fast transitions. Slot's side retained a demanding physical workload but placed greater emphasis on possession, build-up play and moving opponents around.
Robertson's comments therefore offer a different perspective on the criticism surrounding Slot's training methods, while highlighting just how significant the tactical and analytical changes were following Klopp's departure.