The Blues players flocked around referee Bjorn Kuipers after PSG striker Zlatan Ibrahimovic lunged into a tackle with Oscar. While at first the tackle may have appeared a bit reckless, but one second look it was clear that it was not worthy of a red card. Cynics could even suggest that Oscar was more at fault for heading in with his studs up, to say nothing of his over-the-top reaction.
Pundits, former players and fans reacted to the events at Stamford Bridge:
Sky Sports pundit Jamie Carragher: "The worst bit of dirty tricks was from Chelsea, surrounding the referee, the reaction was disgraceful… Jose Mourinho could end up being the most successful manager ever with the trophies he goes on to win in his career but I don't think him and his teams will be ever be loved because of actions like that."
Former referee Graham Poll writing for the Daily Mail: “The behaviour of Chelsea’s players as they surrounded Bjorn Kuipers was nothing short of disgraceful, but it’s a sign of the way the modern game is going."
Former Liverpool striker John Aldridge on Twitter: "Chelsea simply got what they deserved. The way they played portrayed their manager. Negativity at home, rarely works."
Former Tottenham boss Osvaldo Ardiles on Twitter: "Very very poor performance for Chelsea, so defensive. Pity to see such a wonderful array of players playing so negative. Best team won."
BBC presenter Mark Chapman: "They are all as bad as each other. I don't think these two sides are the only ones that do it. We see it week in week out."
Former Liverpool manager Graeme Souness on Sky Sports: "The reaction of the Chelsea players on the challenge on Oscar is something we can do without. I find it totally unacceptable. That's how pathetic it is."
BBC commentator Alan Green: "Never in a month of Sundays was this an acceptable game of football. I'm not defending any of these cretins out there who are behaving disgracefully."
BBC pundit Mark Lawerson: "The reaction of Chelsea was amazing. Oscar should get an Oscar."
It would be wrong to suggest that Chelsea's players are the only ones who act in this manner, but the Blues do seem to cross the line too often. Did Chelsea overstep or is the incident being blown out of proportion? Let us know what you think.