Carlo Ancelotti has insisted he will never harp on about refereeing decisions ahead of Chelsea's must-win Champions League quarter-final second leg at Manchester United.
Ancelotti and his players were furious about Alberto Undiano Mallenco's failure to award the Blues a last-gasp penalty in Wednesday night's 1-0 first-leg defeat at Stamford Bridge.
It was the latest crucial call to go against Chelsea during their eight-year quest to be crowned champions of Europe and left them in danger of ending the season without a trophy, only the third time that would have happened in the Roman Abramovich era.
United boss Sir Alex Ferguson spent the build-up to Wednesday's clash bemoaning refereeing decisions he felt had gone against his side this season. But they certainly enjoyed the rub of the green at Stamford Bridge.
Asked if he felt complaining more would help his own side's cause, Ancelotti said: "I'll never do this. UEFA will take a decision on the referee's performance. That's it. I don't want to be involved more in this discussion.''
Ferguson has been accused in the past of having an undue influence on referees but Ancelotti denied he had any effect on Wednesday.
"No, above all on the Spanish referee,'' he said. "Maybe two weeks ago he (Ferguson) was complaining about the referee's decisions, but this week he was happy. I said to him after the game that now he doesn't have to complain about this. He was laughing.''
Mallenco's call prompted Blues captain John Terry to declare the world was against Chelsea winning the Champions League. But Ancelotti said: "We don't have to think that everyone is against Chelsea. We have to think that we were not lucky in the past about the decisions, and we hope that in the future things will change.
"We ask just to have respect and, when the decision is clear, you have to take a decision.''