DONCASTER Rovers are staring down the barrel of a return to League One after they were hit for four at the King Power Stadium.
Their chances of pulling off a great escape suffered a potential hammer blow as the Foxes ran riot, while both El Hadji Diouf and Frederic Piquionne limped off with injuries.
Danny Drinkwater fired the hosts ahead on 33 minutes when he latched onto David Nugent's knock down and drilled left footed past Carl Ikeme.
Rovers were still very much in the game at 1-0 but an Ikeme howler left them with a mountain to climb at the start of the second half.
Ikeme went to gather Lee Peltier's low right wing cross but only succeeded in spilling the ball into his own net just two minutes into the second period.
It was a horrible moment for the on-loan Wolves keeper which almost summed up Doncaster's season.
Ben Marshall curled in a superb third before Paul Gallagher rubbed salt in Rovers' wounds when he got through on goal and slotted in number four.
James Coppinger went close on a couple of occasions before the break but the visitors lacked conviction in the final third and were made to pay by Leicester.
Substitute Chris Brown also missed a sitter late in the second half - but by then the game was up for Rovers.