After the final whistle blew, the hostile Stamford Bridge crowd directed their fury towards the Norwegian match official as Didier Drogba infamously labelled the game as a 'f***ing disgrace' live on television.
That night has went down as one of the most controversial matches in Champions League history after Tom Henning Ovrebo waved away four penalty claims for Chelsea during their semi-final second leg with Barcelona in 2009.
Ovrebo admits that his mistakes ultimately cost Chelsea that night in west London after the Catalan giants went through on away goals.
The retired official told Spanish newspaper Marca: 'It was not my best day, really.