Below is a summary of the full article. Click here for the full version or go back to LFC Live.net
The Manchester City boss has been involved in some titanic tussles with Jürgen Klopp down the years and believes the German has been the 'toughest opponent' of his career.
It looks as though Arne Slot will get to test himself against the Spaniard next season, having previously been compared to Guardiola due to his attacking style of play.
Slot has even admitted to being inspired by the City boss, who many believe to be one of the greatest ever.
He could lead his side to a record fourth successive Premier League title this season, with City locked in a battle with Arsenal at the top.
Yet Souness isn't convinced it all comes down to his managerial credentials.
READ MORE: Liverpool could face Man City showdown in Champions League amid new seeding format
READ MORE: Liverpool legend has already advised Thiago Alcântara to join Premier League title rivals
"Recruitment is the single biggest thing you have to get right at a football club.
The likelihood is you will win stuff," he told the Three Up Front podcast.
“Pep Guardiola, whatever league he's been in, he's had the best group of players.
Liverpool meanwhile has forked out around $1bn (£800m/€928m) on new recruits during the Klopp era.
Both sides will likely look to strengthen again this summer although any major incomings will likely have to be funded by outgoings due to strict Profit and Sustainability Rules in the Premier League.
Liverpool.com says: There is no doubt that Guardiola has spent big, and worked with the best players, but his continued success should not be questioned.
Were it not for this City team, Liverpool would have dominated the Premier League for the last five years.
For more news relating to Arsenal, visit our sister site AFC Latest Live.