Paris Saint-Germain have sent a detailed five-page letter of complaint to UEFA about the performance of German referee Deniz Aytekin during last week's extraordinary Champions League tie against Barcelona. It includes a dossier of errors made by the official.
The French club have employed experts, including former international referees, to analyse the match in which Barcelona overturned a 4-0 deficit from the first leg to win 6-1 and progress into the last eight.
There were a series of controversial incidents during the game, with Aytekin awarding Barcelona two penalties and coming under extreme pressure from the Barca players.
PSG have included eight incidents in their report which they have submitted to European football's governing body, demanding that such mistakes are not repeated, but they have not asked for the game to replayed.
The dossier, including video clips, highlights a series of incidents including the first penalty awarded to Barcelona, for a foul on Neymar, an apparent stamp by Neymar on his fellow Brazilian Marquinhos, a handball by Gerard Pique and a shirt pull also by the defender that went unpunished.