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."
|Get King Kong for AJ! Joshua understands critics´ demands|
|Korea change sees Bertens take title in Seoul|
|I love Bilic, but I let him down – Arnautovic|
|He will never fight me! Fury hits out at ´ponderous´ Joshua|
|Azpilicueta convinced Hazard can be ´the best´|
|Wigglesworth´s career in Opta numbers as he breaks Premiership record|
|Ronaldo has nothing to prove, says Allegri|
|Federer shines as Europe hold narrow lead at Laver Cup|
|Astros, Yankees and Indians record dramatic wins|
|Pliskova too strong for Osaka in Tokyo final|
|Kyle Busch comes from behind to win again in Virginia|
|Dybala can play as a striker – Allegri|
|Pochettino never doubts ´special´ Kane|
|NASCAR results at Richmond: Kyle Busch comes from behind to win again in Virginia|
|McIlroy just worried about himself at Tour Championship|
|MLS Review: Atlanta stay clear of Red Bulls|
|Rose reminds everyone Woods has been here before|
|Cronk in doubt for Grand Final due to ´severe´ shoulder injury|
|Timberwolves sign Towns to extension|
|Hearn wants Wilder for Joshua, not ´un-entertaining´ Fury|
|Woods pleased with putting consistency|
|Ballon d´Or not a focus for Asensio|
|Man City star Mendy revels in Joshua triumph|
|Braves clinch first NL East title since 2013|
|I want Wilder, says Joshua|
|Inter must live on the edge to win, says jubilant Spalletti|
|Woods leads by three at Tour Championship|
|Bordeaux end Clermont´s perfect start, Zebo at double in Racing win|
|Lopetegui not worried about Courtois footwork|
|Joshua finds emphatic answer to Povetkin challenge|
|BREAKING NEWS: Brutal Joshua knocks out Povetkin in seventh round|
|Real Madrid can´t win 5-0 every week - Varane|
|Al Ahly 4 Horoya 0 (4-0 agg): Egyptian giants reach CAF Champions League semi-finals|
|Kings upset Warriors, Leinster batter Edinburgh|
|Son committed to Tottenham amid Bayern links|
|Simeone hails Atleti´s best LaLiga display of the season|
|Kovac: Bayern ´dominated´ Schalke in 2-0 win|
|Pochettino unimpressed with Tottenham´s tense finish|
|Campbell gains revenge as Price is halted by injury|
|Tottenham fatigue rumours are a myth, claims Rose|
|Widnes defiant after Super League relegation, Saints outclass Wolves|
|NFL must go back to college to eradicate the tie|
|Real Madrid 1 Espanyol 0: Asensio downs old club to earn narrow win|
|Sampdoria 0 Inter 1: Brozovic wins it late after VAR takes centre stage|
|Rudy takes blame for James goal in Bayern win|
|Tiger charges into four-shot lead|
|Players have given their lives to Burnley - Dyche|
|QPR 0 Norwich City 1: Pukki hits winner as hot streak continues|
|Nuno proud of Wolves character in Man United draw|
|Playing for England my dream, says in-form Maddison|
|Brighton and Hove Albion 1 Tottenham 2: Kane on target as Spurs issue firm response|
|Schalke 0 Bayern Munich 2: James and Lewandowski deliver another win|
|Getafe 0 Atletico Madrid 2: Lemar inspires routine win|
|Championship Review: Monk ruins Leeds´ unbeaten streak, McGinn screamer fails to save Villa|
|Bale benched for Real Madrid-Espanyol|
|Biggar fails to rescue Saints at Bath, Bristol and Wasps win|
|Zaha affected by back injury – Hodgson|
|Mourinho slams Manchester United attitude after Wolves stalemate|
|Herbert holds Portugal Masters advantage|
|Warnock blasts ´elementary´ Cardiff mistakes|
|Shaqiri substitution not easy for Klopp|
|Guardiola hopes for even more to come from Aguero|
|Fellaini accepts United closing gap to Premier League summit will be difficult|
|Klizan to face Thiem in St. Petersburg final, Bachinger shocks Nishikori|
|Klopp: Van Dijk injury not serious|
|Mourinho annoyed by Man Utd´s blunt attack in Wolves draw|
|Valverde not ready to consider Barca contract extension|
|Gattuso wary of wounded Atalanta as Higuain receives further advice|
|Burnley 4 Bournemouth 0: Rampant Clarets claim first Premier League win of the season|
|Crystal Palace 0 Newcastle United 0: Sakho misses sitter as Magpies remain winless|