Chelsea defender Branislav Ivanovic appeared to be hit by an object thrown from the crowd as the Chelsea players celebrated Cesc Fabregas' 88th minute winner at QPR on Sunday.
Ivanovic was seen grabbing his neck in pain, having seemingly been struck by a lighter, as the Blues netted a late winner at Loftus Road.
After the game though, Chelsea manager Jose Mourinho played down the incident, telling Sky Sports: "The game was correct in the pitch and correct in the stands, and hopefully correct outside. It is not easy in an emotional game like that.
"If, at the end of the game, someone threw a pound coin, put it in your pocket. If someone threw a chocolate, eat it. It is no problem, everybody needs a pound!"