Sunderland - Defending champions Leicester lost for the seventh time in 14 matches, slumping to a 2-1 defeat at Sunderland on Saturday.
Jermain Defoe's eighth goal of the season ultimately condemned Leicester to their latest loss which that kept the champions two points above the bottom three.
Sunderland are still in the relegation zone despite winning three of their last four games.
Defoe struck in the 77th minute after Robert Huth's own goal gave the home side the lead at Stadium of Light in the 64th.
Substitute Shinji Okazaki pulled a goal back in the 80th for the visitors, who still cannot transfer their Champions League form to the Premier League.
Leicester have qualified for the knockout stage of their first Champions League campaign with a group game to spare.