Leicester's winless start to their Europa League campaign continued with a limp defeat at Legia Warsaw, who collected a famous victory in Poland.
Brendan Rodgers' side have started the season inconsistently and now have work to do in Group C following a defeat to go with their 2-2 draw at Napoli in the opening game.
Azerbaijan national Mahir Emreli scored the only goal in the 31st minute, outmuscling Daniel Amartey on the edge of the box before firing in a low finish via the foot of the post.
Leicester lacked rhythm but did have chances with Ayoze Perez screwing wide in the first half after being put through by Patson Daka.
Centre-half Jannik Vestergaard had a golden opportunity to equalise in the second half, but his header from four yards out was somehow kept out by Legia goalkeeper Cezary Miszta's stunning reflex save.
The group's other game was a crazy affair, with Spartak Moscow edging Napoli 3-2 in a feisty match featuring 12 yellow cards and two reds.
Quincy Promes made it 3-1 in the 90th minute and although Victor Osimhen pulled one back for Napoli four minutes later, the Serie A side could not find a leveller with 11 minutes added on.
Rodgers later said: "It has been a privilege to play here. This is a precious victory for Legia and congratulations to them. We are disappointed because I think we deserved more.
"In the first half we were too passive. In the second it was better, we created more chances. From 60 minutes we started to make chances, we dominated the game, but their goalkeeper played well and we weren't clinical enough. There's still a long way to go.
"I've made the changes but it doesn't take away the importance from it. We have four more games to qualify. As a football club, we're new to the level."
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