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.