Stephen Odey came off the bench in the 81st minute for fellow Nigerian forward Paul Onuachu who started the game for Belgian club Genk.
Odey was booked in the 84th minute for a foul, before netting the consolation goal for Genk in the 88th minute.
Beating world class Brazilian goal keeper, Allison Becker with a swift turn and a sublime finish. On a night, where Liverpool put four goals past Genk at the luminous arena.
Oxlade chamberlain opened the scoring as early as the 2nd minute and added a stunning second 13 minutes after the restart.
Goals from Mane in the 77th minute and Salah in the 87th minute completed the rout and a stellar performance for Liverpool.
Giving them just their second away win, in as many as 11 Champions league games.