Reds defender Joel Matip spoke after Liverpool's 2-3 defeat to West Brom at Anfield on Monday night.
Alan Pardew's side claimed a 3-2 win in an eventful clash at Anfield, ensuring Liverpool failed to progress beyond the fourth round of the competition for the third year in a row.
Roberto Firmino opened the scoring but a double from Jay Rodriguez turned the game on its head, before a third Baggies goal was disallowed and a Liverpool penalty awarded through VAR, only for Firmino to miss from 12 yards.
WATCH: Klopp's reaction to West Brom loss
Joel Matip's own goal at the end of the first half ultimately proved decisive, with Mohamed Salah's 78th-minute strike coming too late to spark a comeback.
Watch Matip's reaction as he admits he made an error for West Brom's final goal.