But on the pitch at least, the mood was visibly lifted as Juan Mata opened the scoring, while Fernando Torres was also on target and David Luiz dominated the midfield.
And Mata summed up the atmosphere best after the game as he looked ahead to the Club World Cup final clash with Corinthians.
"We have confidence about winning but we know Corinthians are one of the best teams in South America," he said.
"It will be a football party and hopefully we will win."
|Mata and Co. kick off Chelsea 'football party'