Liverpool were struggling to create many opportunities, with coach Juergen Klopp ringing the changes in the second half, and one of those substitutes came up trumps - Firmino flicking home from a corner to break the deadlock in the 75th minute.
With their resistance broken, the errors started to creep in for Inter and Salah pounced when they failed to clear a long ball into the box to put the game to bed seven minutes from time.