A Uefa report has supported Chelsea's claims Barcelona coach Frank Rijkaard spoke to referee Anders Frisk at half-time of the Champions League tie.
Rijkaard (right) was seen talking to referee Anders Frisk
Uefa's venue director Pascal Fratellia said: "The referee told us he had contact with Rijkaard from the pitch to the front of his dressing room door.
"Rijkaard wished to say hello at the beginning of the tunnel and then tried to talk to him climbing the stairs.
"Frisk told him it was not the place or moment to speak about the match."
Blues boss Jose Mourinho was banned from the touchline for two matches for suggesting Rijkaard was seen in Frisk's dressing room.
Chelsea, who were fined £33,000 and labelled "liars" for the remarks, later accepted Frisk spoke to Rijkaard outside his room.
But the club has been adamant all along that such a talk took place.
Chelsea would not comment on Fratellia's report, but Uefa played down the importance.
"I don't know why the story is making headlines again now. Everyone has known what was in the official report from the Uefa venue director for weeks," director of communications William Gaillard said.
"They formed part of the charges against Chelsea last week and the reports in the media contain nothing new.
"Chelsea were fined and their coach Jose Mourinho fined and banned for two matches because Chelsea claimed that the Barcelona coach went into the referee's room and tried to influence his handling of the game.
"This did not happen and this is what Chelsea were punished for."