Timo Werner scored twice from the spot as Chelsea took control of their Champions League group with a 3-0 win over Rennes.
The German won and converted a penalty in the 10th minute at Stamford Bridge to set Frank Lampard's side on their way to their second victory in Group E.
And the job was all but done by half-time as the visitors found themselves on the wrong end of a controversial VAR call.
An inadvertent handball from Rennes defender Dalbert resulting from his attempts to block a shot was harshly penalised with the award of both a penalty and a second yellow card.
Werner simply compounded the French side's pain from there, smashing the ball into the roof of the net from 12 yards.
Chelsea rubbed salt in their opponents' wounds in the second half as Tammy Abraham tapped in from a delightful Reece James cross from the right.
But Lampard's attentions quickly turned to a weekend meeting with Sheffield United as he made a host of chances late on.
Key Events
Player Ratings: Chelsea 3-0 Rennes: Who were the Blues' best and worst performers?
Yellow card for Romain Del Castillo.
Yellow card for Mateo Kovačić.
Substitute in, Adrien Hunou.
Substitute out, Sehrou Guirassy.
Substitute in, Callum Hudson-Odoi.
Substitute out, Hakim Ziyech.
Substitute in, Antonio Rüdiger.
Substitute out, Thiago Silva.
Yellow card for Jorginho.
Substitute in, Olivier Giroud.
Substitute in, Mateo Kovačić.
Substitute in, Emerson.
Substitute out, Tammy Abraham.
Substitute out, N'golo Kanté.
Substitute out, Ben Chilwell.
Substitute in, Clément Grenier.
Substitute in, Romain Del Castillo.
Substitute in, Jeremy Doku.
Substitute out, Steven Nzonzi.
Substitute out, Yann Gboho.
Substitute out, Martin Terrier.
Assist given by Reece James.
Goal by Tammy Abraham.
Substitute in, Adrien Truffert.
Substitute out, James Lea Siliki.
Penalty scored by Timo Werner.
Red card for Dalbert.
Yellow card for Hakim Ziyech.
Yellow card for N'golo Kanté.
Penalty scored by Timo Werner.
Yellow card for Dalbert.