Leicester City suffered their first Champions League defeat of the season when they were thrashed 4-0 by Porto.
It was last season's third-placed team in the Portuguese Primeira Liga v the champions of the Premier League, but Claudio Ranieri's side were much changed and well beaten at Estadio do Dragao.
It took just six minutes for Andre Silva to open the scoring, heading home a corner and City shot-stopper Ben Hamer could possibly have done better.
Jesus Corona doubled their lead on 26 minutes with a stunning volley inside the box - for his first Champions League goal - and it was three before the break when Yacine Brahimi beat Hamer with a neat flick at the near post.