Leeds United ended Leicester City's nine-game winning run in the Championship with an impressive victory at the King Power Stadium.
Joel Piroe went close in the opening moments for Leeds while Leicester's Abdul Fatawu hit the bar 11 minutes before half-time in a tight first half.
But Leeds were the better side after the break and took a deserved lead when Georginio Rutter converted from close range after Sam Byram's header a corner was palmed away by Mads Hermansen.
Substitute Kelechi Iheanacho had a late effort blocked for the Foxes before Kiernan Dewsbury-Hall's stoppage-time header forced a superb first save from Leeds goalkeeper Illan Meslier.
Leicester remain five points clear of second-placed Ipswich Town - who have two games in hand - at the top of the Championship, but miss out on a club-record 10th successive league win.
Meanwhile Leeds, who came down from the Premier League with the Foxes last season, cut the gap between the two relegated sides to 11 points and consolidated third place in the table.
Relive Leeds' win at LeicesterMore to follow.
Line-ups
Leicester
Formation 4-3-3
30Hermansen21Ricardo Pereira3Faes23Vestergaard2Justin7CasadeiSubstituted forChoudhuryat 67'minutesBooked at 89mins8Winks22Dewsbury-Hall18Fatawu9VardySubstituted forIheanachoat 59'minutes10MavididiSubstitutes
4Coady11Albrighton14Iheanacho15Souttar17Choudhury20Daka35McAteer40Marçal-Madivadua41StolarczykLeeds
Formation 4-2-3-1
1Meslier22GraySubstituted forAylingat 90+4'minutes14Rodon21Struijk25ByramBooked at 26mins8Kamara4Ampadu20JamesSubstituted forAnthonyat 90+4'minutes7PiroeSubstituted forBamfordat 84'minutes10SummervilleBooked at 88minsSubstituted forGnontoat 90'minutes24RutterSubstituted forGruevat 84'minutesSubstitutes
2Ayling3Firpo6Cooper9Bamford12Anthony27Poveda28Darlow29Gnonto44GruevReferee:Dean Whitestone
Attendance:32,011
Live Text
Match ends, Leicester City 0, Leeds United 1.
Second Half ends, Leicester City 0, Leeds United 1.
Stephy Mavididi (Leicester City) wins a free kick on the left wing.
Foul by Jaidon Anthony (Leeds United).
Corner, Leicester City. Conceded by Luke Ayling.
Attempt saved. Kiernan Dewsbury-Hall (Leicester City) header from very close range is saved in the top left corner. Assisted by Abdul Fatawu with a cross.
Substitution, Leeds United. Luke Ayling replaces Archie Gray.
Substitution, Leeds United. Jaidon Anthony replaces Daniel James.
Offside, Leeds United. Glen Kamara tries a through ball, but Patrick Bamford is caught offside.
Substitution, Leeds United. Wilfried Gnonto replaces Crysencio Summerville.
Hamza Choudhury (Leicester City) is shown the yellow card.
Crysencio Summerville (Leeds United) is shown the yellow card.
Hamza Choudhury (Leicester City) wins a free kick on the right wing.
Foul by Crysencio Summerville (Leeds United).
Corner, Leicester City. Conceded by Archie Gray.
Attempt blocked. Kelechi Iheanacho (Leicester City) left footed shot from the centre of the box is blocked. Assisted by Abdul Fatawu.
Ricardo Pereira (Leicester City) wins a free kick in the defensive half.
Foul by Ilia Gruev (Leeds United).
Substitution, Leeds United. Ilia Gruev replaces Georginio Rutter.
Substitution, Leeds United. Patrick Bamford replaces Joël Piroe.