Jamie Vardy missed a second-half penalty as Leicester City could only draw 1-1 with Spartak Moscow on Thursday to leave Europa League Group C wide open.
Victor Moses put Spartak ahead early in the second half when he escaped the attentions of Leicester's defence and planted a firm header low into the corner of the net.
The Foxes equalised shortly afterwards when Daniel Amartey headed in from a corner, before Moses gave away a penalty when he hauled down Ademola Lookman.
Substitute Vardy stepped up to take the spot-kick, but Spartak goalkeeper Alexander Selikhov guessed correctly to ultimately secure the visitors a point.
Leicester's positive intent almost brought an early opener as Ayoze Perez headed wide from a good position, before Selikhov saved well from Kelechi Iheanacho.
Spartak were content to sit deep, giving Boubakary Soumare the time to shoot from distance as he struck the underside of the crossbar with a spectacular effort.
Despite enjoying 73.7 per cent of possession in the first half, that was as close as the Foxes went before the interval and Spartak took the lead six minutes into the second half – Mikhail Ignatov's right-wing cross allowing the unmarked Moses to guide a header beyond Kasper Schmeichel.
Leicester levelled just before the hour when Perez flicked on Ryan Bertrand's in-swinging corner and Amartey outmuscled Roman Zobnin to head in.
Shortly after replacing Patson Daka, Vardy was presented with a chance from the penalty spot with 14 minutes left after Moses felled Lookman, but Selikhov dived low to his left to save superbly.
Leicester had a final chance through Kiernan Dewsbury-Hall's saved header, with Iheanacho unable to pounce on the rebound.