The twenty-four year old has been at Royal University Hospital today as he goes through the relevant checks on his health and fitness.
He was wearing shorts with the number 29 on them – which could mean that he will wear that number next season when he lines up for the Reds.
Liverpool have agreed a deal worth in excess of £30m for the Senegal international after he spent two seasons with the South Coast club.
He moved to Southampton from Red Bull Salzburg in the Summer of 2014 – having been linked with a move to Anfield.
But then manager Brendan Rodgers did not want to bring him to Anfield in a deal worth around £10m.
Jurgen Klopp has decided that Mane is worth spending big on, however.