The 20-year-old is an international teammate of Sadio Mané, who Liverpool fans were watching when youngster Sarr caught their eye.
Having scored five goals and assisting a further three for Rennes in Ligue 1 last season, Sarr's direct style of attacking play caught the eye as Senegal battled to a 2-2 draw against Japan in the group stage.
Sarr is a player with great potential, with one fan claiming that it could be 'scary' to see what Sarr could be capable of if he were to be coached by Reds boss Jürgen Klopp.
If Sarr were to join Liverpool, it is likely that he would only be a back-up option, due to the form of Sadio Mané, Mohamed Salah and co. The youngster would find it difficult to get into the side, but he could be a valuable prospect for Liverpool - maybe with a loan back to France to aid his development.
Liverpool have already signed midfielders Naby Keita and Fabinho this summer to boost their midfield options.