Jubilant Legia Warsaw fans stripped to the waist in the away end at Stamford Bridge on Thursday during a shock 2-1 win over Chelsea that laid bare the hosts' lack of intensity in the second leg of their Conference League tie.

Chelsea captain Reece James has said his side "disrespected the competition" as they lost 2-1 to Polish side Legia Warsaw in the UEFA Conference League quarterfinal on Thursday.

Chelsea punched their tickets to the UEFA Conference League semifinals and remain the overwhelming favorites to win the competition. Enzo Maresca's side arrive to the semifinals having won nine of the 10 games they've played so far since the start of the league phase.