Goals from Salah and Divock Origi helped Jurgen Klopp’s men clinch a 2-0 victory over their English rivals Tottenham Hotspur in Madrid.
Despite an impressive season, the Reds missed out on the Premier League title by a point to Manchester City.
Liverpool have now been boosted by winning the top European club trophy, and so ending a seven-year title drought, having last won a diadem in 2012 [League Cup].
Salah scored five goals in 12 games in the competition while Mane had four goals in 13 appearances.
Keita was limited to six appearances due to injury while Matip played eight times for the Reds in the tournament.