The Blues were awarded a penalty and Dalbert was given a second yellow card in an incident that crippled the Ligue 1 side's chances
Rennes head coach Julian Stephan has expressed his bewilderment over a controversial handball decision against his side in Wednesday's defeat at Chelsea.
The Blues were already ahead 1-0 in their Champions League Group E match after Timo Werner had converted from the spot. Chelsea's first penalty was clear-cut but their second, awarded four minutes before half-time, was far more controversial.
Tammy Abraham’s shot deflected off Dalbert's arm, with the Rennes defender appearing to know little about it.