Five Chelsea fans with disabilities allege that they were subjected to abuse throughout the match. The allegations are understood to include claims that PSG fans threw a bottle and spat at their disabled visitors.
If found guilty PSG could be subject to a fine or partial stadium closure during European matches. A UEFA statement yesterday read: "Disciplinary proceedings have been opened against PSG for alleged offences concerning 'racism, other discriminatory conduct and propaganda' at their UEFA Champions League quarter-final played against Chelsea in Paris.
"The UEFA control and disciplinary body will decide on the matter on 17 July 2014."