The deal is the first major signing of the Jurgen Klopp era and the first time we have seen the German seriously open his cheque book.
But Mane was not his first choice. His friendship with Mario Gotze from their time together at Borussia Dortmund is well-known and with the Germany international underused and unsettled at Bayern Munich, a switch to Anfield seemed a distinct possibility.
But no deal has been forthcoming and the rapid movement towards a Mane completion would suggest that the Reds have given up on the World Cup winner.
Instead, they will be the second club to deprive manager-less Southampton of a starting player this month after Victor Wanyama sealed his switch to Tottenham.
But – assuming Mane’s medical throws up no problems – what have Liverpool got themselves?
Most of all, they have a goal-scorer. Mane has reached double figures in four consecutive league seasons, with 21 Premier League goals in his two years at Southampton.