Southampton forward Sadio Mane will have a medical at Liverpool on Monday after the Reds agreed a £30millon fee for the Senegal international.
The 24-year-old is expected to arrive on Merseyside on Monday to undergo his physical examination and discuss personal terms.
Providing there are no hitches a deal is likely to be concluded by Tuesday or Wednesday.
Mane, who scored 11 league goals last season, will become manager Jurgen Klopp's fourth signing after agreeing deals for midfielder Marko Grujic, centre-back Joel Matip and goalkeeper Loris Karius.
He is the fifth player in the last three seasons to swap St Mary's for Anfield after Dejan Lovren, Rickie Lambert, Adam Lallana and Nathaniel Clyne all made the same move to the north-west.
Mane will become Liverpool's third most expensive signing after Andy Carroll (£35million) and Christian Benteke (£32.5m), whose own future at the club has been cast into further doubt by this latest deal.
Liverpool are still hoping to tie up deals for Leicester left-back Ben Chilwell and Poland midfielder Piotr Zielinski as part of their summer transfer spending.