Raymond van Barneveld's glittering darts career came to a crushing end as he lost to unfancied American Darin Young in the first round of the World Darts Championship at Alexandra Palace.
And he later declared: "I will never forgive myself."
Five-time world champ Barney was beaten 3-1 in front of an adoring crowd to bring the curtain down on the legendary Dutchman's 35-year career.
Young took the first set 3-2 before Barney hit back by whitewashing his opponent in the second.
But Young punished a missed dart at tops for the set from Van Barneveld to snatch the third 3-2 and followed that up by taking the fourth by the same score to claim victory.
A devastated Barney walked straight off the stage rather than take the adulation of the crowd.
He spoke to Sky Sports shortly afterwards, and said: "I played really bad tonight. I was surprised. Darin played really well, all credit to him.
"I lost in the first round. In my disaster year - I will never forgive myself. Never ever."
Van Barneveld had confirmed that this would be his last tournament on the professional circuit having won the PDC title in a classic final against Phil Taylor in 2007.
That followed four BDO crowns in 1998, 1999, 2003 and 2005.
Barney won the UK Open twice in 2006 and 2007, the Desert Classic in 2007 and the Grand Slam in 2012.
His last major triumph came when he won the 2014 Premier League.
Van Barneveld wasn't the only former PDC world champion to crash out on Saturday night as 2018 winner Rob Cross was whitewashed 3-0 by Belgian Kim Huybrechts.