Premier League leaders Chelsea ruthlessly tightened their grip on top spot by punishing the failings of lacklustre Leicester at King Power Stadium.
Antonio Rudiger continued his habit of scoring against the Foxes with a glancing, looping header from a corner whipped in by ex-Leicester wing-back Ben Chilwell.
Another former Foxes favourite, midfielder N'Golo Kante, doubled the lead by firing home from the edge of the box after being allowed to roam 30 yards virtually unchallenged.
Chelsea could have been out of sight by half-time, Chilwell grazing the bar when he should have scored from an early one-on-one with Kasper Schmeichel, who later denied Kante with his legs.
Leicester offered more as an attacking force after the break as Edouard Mendy made a fabulous save to tip away a fierce long-range shot from Daniel Amartey and Jamie Vardy headed over from close range.
But Chelsea, who stretched their lead at the top to six points before Saturday's later kick-offs, could have had more as Schmeichel saved smartly from Chilwell and Callum Hudson-Odoi curled inches over.
The Blues had also three goals ruled out for offside, the assistant's flag foiling Hudson-Odoi, Reece James and substitute Christian Pulisic, who slotted home Chelsea's third from Hakim Ziyech's cross.
Leaders on a real Power trip
Leicester City 0-3 Chelsea: Tuchel 'very happy' with 'strong' performanceThe Blues' last trip to King Power Stadium inadvertently led to the beginning of the Thomas Tuchel era, a limp 2-0 defeat in January proving to be predecessor Frank Lampard's final game, and this display was further evidence, if needed, of how much they have progressed since.
It was Chelsea's fourth win in five Premier League away games, and they are yet to concede from open play - the only points they have dropped coming in a 1-1 draw at Liverpool when the Blues played the entire second half a man light.
Just as impressive as their dazzling defensive record - just four goals conceded in 12 games - has been their ability to conjure goals despite injuries to Romelu Lukaku, Timo Werner and Pulisic.
Christian Pulisic scored his second Premier League goal of the season in just his third game of an injury-hit campaignNo team in the top flight has had more players find the net than Chelsea - 15 - and the fact Rudiger and Kante, hardly prolific scorers, both registered their second goals of the campaign was further proof Tuchel's side, who barely missed a step on their return from the international break, carry a threat from all over the pitch.
Foxes' failings laid bare by Blues
Leicester City 0-3 Chelsea: Foxes lacked 'belief' against outstanding opponents - RodgersIt was another chastening afternoon for Leicester, who have become regular contenders for the Champions League places in recent seasons, but look as far away from that top four as at any point of Brendan Rodgers' reign.
Since the start of last season, no side has conceded more goals from corners than the Foxes with Rudiger's early effort taking that tally to 15.
However, they were torn apart just as often from open play, as evidenced by defence-splitting through balls from Jorginho that led to big chances for Chilwell and Kante, while the room the latter was allowed to run into for his goal verged on embarrassing.
They were just as poor defensively after the interval, as only some wasteful finishing, a couple of Schmeichel saves and some marginal, albeit correct, offside calls kept the margin of defeat respectable.
Player of the match
KantéN'Golo Kanté
Leicester City
Squad number1Player nameSchmeichel
Squad number18Player nameAmartey
Squad number10Player nameMaddison
Squad number9Player nameVardy
Squad number6Player nameEvans
Squad number25Player nameNdidi
Squad number14Player nameIheanacho
Squad number4Player nameSöyüncü
Squad number37Player nameLookman
Squad number11Player nameAlbrighton
Squad number27Player nameCastagne
Squad number22Player nameDewsbury-Hall
Squad number42Player nameSoumaré
Squad number7Player nameBarnes
Chelsea
Squad number7Player nameKanté
Squad number29Player nameHavertz
Squad number24Player nameJames
Squad number2Player nameRüdiger
Squad number6Player nameThiago Silva
Squad number10Player namePulisic
Squad number16Player nameMendy
Squad number21Player nameChilwell
Squad number20Player nameHudson-Odoi
Squad number22Player nameZiyech
Squad number14Player nameChalobah
Squad number5Player nameJorginho
Squad number12Player nameLoftus-Cheek
Squad number19Player nameMount
Line-ups
Leicester
Formation 3-4-3
1Schmeichel
18Amartey6Evans4Söyüncü
11Albrighton42Soumaré25Ndidi27Castagne
37Lookman9Vardy7Barnes
1SchmeichelBooked at 45mins18AmarteyBooked at 40mins6EvansBooked at 45mins4Söyüncü11Albrighton42SoumaréSubstituted forDewsbury-Hallat 75'minutes25Ndidi27Castagne37LookmanSubstituted forIheanachoat 45'minutes9Vardy7BarnesSubstituted forMaddisonat 45'minutesSubstitutes
5Bertrand10Maddison12Ward14Iheanacho17Pérez20Choudhury22Dewsbury-Hall23Vestergaard29DakaChelsea
Formation 3-4-2-1
16Mendy
14Chalobah6Thiago Silva2Rüdiger
24James7Kanté5Jorginho21Chilwell
19Mount20Hudson-Odoi
29Havertz
16MendyBooked at 65mins14Chalobah6Thiago Silva2Rüdiger24James7Kanté5JorginhoSubstituted forLoftus-Cheekat 77'minutes21Chilwell19MountSubstituted forZiyechat 63'minutes20Hudson-Odoi29HavertzSubstituted forPulisicat 62'minutesSubstitutes
1Arrizabalaga3Alonso4Christensen10Pulisic11Werner12Loftus-Cheek18Barkley22Ziyech28AzpilicuetaReferee:Paul TierneyAttendance:32,192Live Text
Match ends, Leicester City 0, Chelsea 3.
Second Half ends, Leicester City 0, Chelsea 3.
Offside, Leicester City. Daniel Amartey tries a through ball, but Kelechi Iheanacho is caught offside.
Attempt missed. Ben Chilwell (Chelsea) left footed shot from outside the box is high and wide to the right. Assisted by Christian Pulisic.
Offside, Chelsea. Hakim Ziyech tries a through ball, but Callum Hudson-Odoi is caught offside.
Offside, Chelsea. Antonio Rüdiger tries a through ball, but Ben Chilwell is caught offside.
Hakim Ziyech (Chelsea) wins a free kick in the defensive half.
Foul by Çaglar Söyüncü (Leicester City).
Corner, Leicester City. Conceded by Thiago Silva.
Corner, Leicester City. Conceded by Édouard Mendy.
Attempt saved. James Maddison (Leicester City) left footed shot from outside the box is saved in the top right corner. Assisted by Kiernan Dewsbury-Hall.
Offside, Chelsea. Antonio Rüdiger tries a through ball, but Ben Chilwell is caught offside.
Substitution, Chelsea. Ruben Loftus-Cheek replaces Jorginho because of an injury.
Substitution, Leicester City. Kiernan Dewsbury-Hall replaces Boubakary Soumaré.
Offside, Chelsea. Hakim Ziyech tries a through ball, but Christian Pulisic is caught offside.
Attempt missed. Hakim Ziyech (Chelsea) left footed shot from the centre of the box misses to the left. Assisted by Reece James.
Goal! Leicester City 0, Chelsea 3. Christian Pulisic (Chelsea) right footed shot from very close range to the bottom right corner. Assisted by Hakim Ziyech.
Christian Pulisic (Chelsea) wins a free kick in the defensive half.
Foul by Wilfred Ndidi (Leicester City).
Foul by Hakim Ziyech (Chelsea).