Alfredo Morelos treble proves his worth to Rangers

[team1]Rangers[/team1][score1]3[/score1][team2]Kilmarnock[/team2][score2]1[/score2][/score]

Alfredo Morelos proved he is invaluable to Rangers as his hat-trick sent Steven Gerrard's men into the Betfred Cup last eight with a 3-1 win at Kilmarnock.