Sam Kerr scored two goals in two minutes in the first halfChelsea delivered the "relentless" performance manager Emma Hayes asked for as they saw off Swiss champions Servette in emphatic style in Women's Champions League Group A.
The Blues, who led 6-0 at half-time, showed the gulf in quality between the sides with impressive attacking play.
Australian forward Sam Kerr and England striker Fran Kirby bagged two goals and two assists each.
Melanie Leupolz, Jessie Fleming and Guro Reiten also got on the scoresheet.
Victory takes Chelsea - last season's runners-up - top of their group for at least a few hours as Wolfsburg play Juventus in the other match at 20:00 GMT.
Hayes made seven changes to the Chelsea side who won 1-0 at Aston Villa in the Women's Super League on Sunday, with returns for Kerr and Kirby, and the strike duo enjoyed themselves in Switzerland.
It was Kerr's flick that set up Kirby's opener and the England international returned the favour, lifting it into the Australian's path a short while later, for what was her second goal in two minutes.
Leupolz had kicked things off with a wonderful left-footed strike before Kerr and Kirby's doubles. Fleming then beat the goalkeeper at her near post with a thumping effort, before Reiten slotted home a seventh Chelsea goal.
There was also a return for Maren Mjelde following injury for the first time since 14 March as she came on as a substitute in the 66th minute.
Chelsea have won two of their three group games so far in the competition and are in impressive form heading into Sunday's Women's Super League match with rivals Manchester City (15:00 GMT).
Line-ups
Servette Women
Formation 4-2-3-1
12Teixeira Pereira
24Soulard14Spälti22Hurni23Fleury
9Lagonia2Tufo
13Tamplin6Nakkach20Padilla-Bidas
7Boho Sayo
12Teixeira Pereira24Soulard14Spälti22Hurni23FleurySubstituted forMäendlyat 45'minutes9LagoniaSubstituted forGuede Redondoat 71'minutes2Tufo13Tamplin6NakkachSubstituted forBourmaat 71'minutes20Padilla-Bidas7Boho SayoSubstituted forGrivazat 89'minutesSubstitutes
3Bourma4Felber8Mäendly17Droz21Guede Redondo33GrivazChelsea Women
Formation 3-4-3
1Musovic
4Bright7Carter16Eriksson
22Cuthbert8Leupolz24Spence11Reiten
17Fleming20Kerr14Kirby
1Musovic4Bright7CarterSubstituted forMjeldeat 66'minutes16ErikssonSubstituted forAnderssonat 57'minutes22CuthbertSubstituted forCharlesat 57'minutes8Leupolz24Spence11ReitenSubstituted forFoxat 57'minutes17Fleming20KerrSubstituted forEnglandat 66'minutes14KirbySubstitutes
5Ingle9England10Ji18Mjelde19James21Charles25Andersson28Telford29Fox30BergerReferee:Iuliana Elena DemetrescuLive Text
Match ends, Servette Women 0, Chelsea Women 7.
Second Half ends, Servette Women 0, Chelsea Women 7.
Foul by Melanie Leupolz (Chelsea Women).
Sandy Mäendly (Servette Women) wins a free kick on the right wing.
Substitution, Servette Women. Alyssa Grivaz replaces Jade Sayo.
Corner, Chelsea Women. Conceded by Tessa Tamplin.
Attempt missed. Jade Sayo (Servette Women) right footed shot from outside the box is close, but misses the top right corner. Assisted by Sandy Mäendly.
Bethany England (Chelsea Women) wins a free kick on the right wing.
Foul by Tessa Tamplin (Servette Women).
Attempt missed. Sandy Mäendly (Servette Women) left footed shot from outside the box is just a bit too high.
Foul by Niamh Charles (Chelsea Women).
Daïna Bourma (Servette Women) wins a free kick in the defensive half.
Attempt missed. Millie Bright (Chelsea Women) left footed shot from outside the box misses to the left. Assisted by Niamh Charles.
Attempt missed. Niamh Charles (Chelsea Women) header from the centre of the box misses to the left. Assisted by Jonna Andersson with a cross following a corner.
Corner, Chelsea Women. Conceded by Nathalia Spälti.
Offside, Chelsea Women. Maren Mjelde tries a through ball, but Jorja Fox is caught offside.
Substitution, Servette Women. Ilona Guede Redondo replaces Alyssa Lagonia.
Substitution, Servette Women. Daïna Bourma replaces Élodie Nakkach.
Offside, Servette Women. Jade Sayo tries a through ball, but Alyssa Lagonia is caught offside.
Attempt missed. Drew Spence (Chelsea Women) right footed shot from outside the box is close, but misses to the left. Assisted by Fran Kirby.
