The referee for Barcelona's Champions League semi-final second leg against Chelsea in 2009 was forced to change his hotel in the wake of the controversial clash at Stamford Bridge.
Tom Henning Ovrebo was at the centre of a firestorm during the clash nine years ago, in which Barca snatched a dramatic 1-1 draw to secure passage to the final on away goals.
Eric Abidal was controversially sent off, but it was Chelsea who were most angered by the officiating, as they saw six appeals for a penalty waved away by Ovrebo.
The last one came in second-half injury time, after Andres Iniesta's stunning strike cancelled out Michael Essien's opener, with Samuel Eto'o escaping a handball shout that prompted Michael Ballack to chase Ovrebo down the pitch and argue his case.
Didier Drogba and Jose Bosingwa both received suspensions for their protests after the final whistle, while Ovrebo said he received several death threats from Chelsea fans in the following years.
The Norwegian, now 51, admits he made a number of errors and says his team even had to move hotels after the match, such was the level of anger at his decisions.
"It wasn't my best day, that's for sure," he told Marca ahead of Barca's trip to Chelsea in the last 16 on Tuesday. "But referees can make those mistakes... sometimes a player or a coach can, too.
"I'm proud of having had a long career and having been among the European elite for a while, and among the best in my country, at least. That's why you can't remember my career just for that game.
"After the match, I didn't speak to any player. I left the pitch with dignity, I went to the dressing room, and that's that.
"Of course, I remember we had to change hotels and there were a lot of people who were hostile towards us. We had to be careful that day and the next.
"I can't change people's opinion. But it would be interesting to ask Real Madrid fans, for example, whether they would have the same opinion of me if it had been in favour of their team, instead of Barca.
"We have seconds to decide. Then you see it on TV and you say: 'Oh my God, I was wrong with that penalty or red card!'. These are normal things.
"I was responsible for the decisions that were made and we can argue that, if I had made others, maybe Chelsea would have reached the final. We'll never know."
Ovrebo admits he should have penalised Eto'o and Gerard Pique for handball in the penalty area and also suggested he should have sent off Ballack for his protests.
"Of course [I remember] and, yes, they were handball situations," he said. "I judged them on the pitch and I think it isn't interesting now to know what I think of every incident once it's been judged, although I understand people think differently to how I refereed. That discussion will carry on forever.
"The important thing was to learn from my mistakes. I made the decision not send him off [Ballack] and that's it.
"It's difficult to explain why decisions are made and not others on the pitch. Maybe it's due to pressure... or in that event it could be because Ballack protested from behind and I didn't see it. There can be many reasons in each decision."
Ovrebo says Chelsea's triumph in the 2012 tournament – when they beat Barca in the semi-finals – helped to stop some of the hateful messages he received, and he insists he is not haunted by that 2009 clash in London.
"At the time, yes [I received death threats]. Now, everything is [in the] past. This was a hot topic until 2012, and then it went away," he added.
"Some fans will remember me after this interview, but I have no problems. People can do what they want. I have a happy life with my friends and family in Oslo. I've already accepted my mistakes."
|Harris backing Starc to fire in Perth|
|No fears over Atleti´s second-place finish for Simeone|
|Clippers buckled under Raptors pressure - Rivers|
|Icardi: Inter deserved to qualify|
|Team Sky future unclear as Sky opt to end involvement in cycling|
|PSG had to change mentality - Thiago Silva|
|Rockets make change, pick up win over Trail Blazers|
|Everything´s easier when you´ve got Messi – Miranda|
|From George Cross to Arsenal – Montemurro´s rise to make Gunners great again|
|Koulibaly challenges Napoli to win Europa League|
|Raptors star Leonard out against Clippers, may miss matchup with Warriors|
|Butler opens up about heated Timberwolves practice|
|Spurs achieved ´mission impossible´, says Pochettino|
|Dembele stunner pleases Barca boss Valverde|
|Van Dijk lauds ´fantastic´ Alisson|
|Van Dijk´s tackle on Mertens worthy of red card – Ancelotti|
|Klopp ´would have paid double´ for Alisson|
|Klopp: I don´t care about Madrid revenge mission|
|Tension and anxiety got to Inter, laments Spalletti|
|Tuchel hails magnificent PSG as Red Star win seals last-16 spot|
|Mbappe admits frank discussions inspired PSG´s Champions League progress|
|Klopp: Napoli had no answers to outstanding Liverpool|
|Pochettino proud of ´massive, massive achievement´ for Spurs|
|Barcelona equal Champions League record|
|Composed and controlled Liverpool see off Napoli to progress|
|Tenerife back to winning ways, AEK beat Hapoel|
|Howedes ´hurt´ after emotional Schalke return ends in defeat|
|Kane ´buzzing´ over ´not bad´ draw at Barcelona|
|Robertson hails Alisson´s ´unbelievable´ save as Liverpool progress|
|Red Star Belgrade 1 Paris Saint-Germain 4: Neymar brilliance helps secure Group C top spot|
|Inter 1 PSV 1: Icardi header not enough for the Nerazzurri|
|Liverpool 1 Napoli 0: Superb Salah sends Reds through|
|Club Brugge 0 Atletico Madrid 0: Simeone´s men miss out on top spot|
|Barcelona 1 Tottenham 1: Lucas rescues Spurs late on to secure progress|
|Monaco 0 Borussia Dortmund 2: Guerreiro double snatches top spot from Atletico|
|Butler´s groin strain ´nothing significant´ – 76ers coach Brown|
|Woakes, Curran among leading lights at IPL auction|
|Blue Jays release five-time All-Star Tulowitzki|
|Mourinho: Professionals care more than the fans|
|Casillas reaches 100 Champions League wins|
|Expansion franchise Cincinnati sign Garza, send Kamara to Rapids|
|Manchester City sign United States goalkeeper Steffen for reported £7m|
|Schalke 1 Lokomotiv Moscow 0: Russians miss chance for Europa League reprieve|
|Galatasaray 2 Porto 3: Terim´s men into Europa League after penalty drama|
|Jackman leaves Dragons role|
|Tottenham boosted as Barcelona bench Messi|
|Mane and Henderson in Liverpool XI to face Napoli|
|Mourinho shoots down question over how to get the best from Pogba|
|Ronaldo to start as Allegri aims to avoid Champions League big guns|
|Odriozola: I´m in love with Benzema, he´s the best number nine in the world|
|Vikings fire OC DeFilippo after loss to Seahawks|
|Marcelino suggests Valencia open to Batshuayi departure|
|Bottas to make rally debut in title-winning M-Sport Ford Fiesta|
|Kovac dismisses Pavard speculation|
|Yaya Toure leaves Olympiacos after just five appearances|
|Riise challenges Liverpool to banish Champions League disappointment against Napoli|
|We rallied around it - Durant on Green confrontation aftermath|
|Valencia ´p****d off´ with Fellaini´s controversial Young Boys winner - Soler|
|More must be done to combat racism at Premier League grounds – Chalobah|
|Napoli will not sack ´big signing´ Ancelotti if they miss Champions League qualification, says De La|
|Guardiola not interested in ´exceptional´ Saul|
|Shai gives Windies hope with thrilling ODI run chase|
|Ten Hag unsure whether to risk Ajax stars against Bayern|
|Erasmus to work with Bulls as Springboks assist Super Rugby sides|
|Paul Gascoigne pleads not guilty to sexual assault|
|Joshua is ´begging´ for unification fight, claims Wilder|
|Silva, Fernandinho add to Guardiola´s injury woes|
|Hosszu storms to 14th gold, Seto smashes Le Clos´ world record|
|Raheem is an incredible human being - Guardiola rallies behind City star Sterling|
|Sexton pens IRFU extension until 2021|