Leicester City lost their unbeaten Champions League record as a second string side suffered a humiliating 5-0 thumping in Porto.
The much-changed Foxes had already qualified from Group G but barely put up a fight as they were outclassed by Porto, who reached the last 16 thanks to the win.
Andre Silva, Jesus Corona and Yacine Brahimi scored in the first half before Silva added a second-half penalty and Diogo Jota netted a fifth.
Porto needed to win to qualify ahead of Copenhagen and set the tone by going ahead after just six minutes.
The last time Leicester lost by five goals or more away from home was against Portsmouth in the Championship in 2010 but, even putting their Champions League qualification into context, it was a humiliation.
Two points above the relegation zone and with Manchester City visiting on Saturday, the champions need to save their faltering season but at least have a last 16 tie next year to cling on to.
Meanwhile Tottenham's winless Wembley run ended as Mauricio Pochettino's men sealed a 3-1 win over CSKA Moscow.
Tottenham's hopes of reaching the Champions League last 16 had already vanished but this result means they finish third in Group E and will now drop into Europe's second tier tournament.
CSKA striker Alan Dzagoev gave the visitors a surprise early lead but goals from Dele Alli and Harry Kane put Spurs in front at half-time before an Igor Akinfeev own-goal completed a comfortable victory.