Guehi has been a key target for Liverpool this summer after Jarrell Quansah left Anfield for Bayer Leverkusen.
There have also been concerns about the solidity of Liverpool’s defence after they conceded six goals in their first three games of the season.
They lost the Community Shield on penalties to Palace – who Guehi captained at Wembley – and gave up two-goal leads in the Premier League to Bournemouth and Newcastle before fighting back to win.
After also bringing in Isak, Hugo Ekitike, Milos Kerkez, Jeremie Frimpong, Giorgi Mamardashvili, Armin Pecsi and Giovanni Leoni, the Guehi deal will take Liverpool’s spending to about £451.2m without add-on fees – the highest total in Premier League history.
It is only the second time that an English side has shelled out more than £400m in a summer window, following Chelsea’s £401.2m outlay in 2023.
Meanwhile, the departures of Luis Diaz, Darwin Nunez, Quansah, Caoimhin Kelleher, Trent Alexander-Arnold, Tyler Morton and Ben Doak have recouped an initial amount of about £190m.