LONDON — About 30 minutes before kickoff at Stamford Bridge on Wednesday, the band of visiting Paris St.-Germain fans in the far end of the stadium sang out in unison. “On est chez nous,” they crooned in French, bragging to the Chelsea fans, “We are at home.”
It was brash and bold. Cocksure and confident. But then, it also fit with the theme from P.S.G. ahead of this second-leg match in the Champions League round of 16. The Parisians seemed utterly unconcerned with tempting fate, riling their opponents or projecting an air of contentment.
P.S.G.’s superstar striker wondered openly about the maturity of Chelsea’s players. The team’s coach called out Chelsea’s top scorer. So, too, did the club’s social media accounts in a bizarre series of posts involving movie characters. All of it could have come off poorly, if not…