Rangers' first-half collapse saw them conclude their dismal Europa League campaign with a 3-1 defeat by Porto in the Estadio do Dragao.
Gers attacker Djeidi Gassama headed the visitors in front after just six minutes but they soon fell apart with some calamitous defending and goals from teenager Rodrigo Mora, Francisco Moura and an Emmanuel Fernandez own goal before the break left Danny Rohl's side reeling, with the Portuguese side comfortably fending off an improved Govan side after the break.
