More than two decades on, Henrik Larsson can barely bring himself to talk about it.
Celtic's heartbreaking loss to Porto in the 2003 Uefa Cup final remains the biggest disappointment of the legendary striker's trophy-laden career.
Larsson was a huge influence in Celtic's run to Seville. He netted 11 goals – including two in the final – and was the competition's second top scorer, one behind Porto's Derlei.
Both players scored a brace in the dramatic showpiece that Martin O'Neill's side lost 3-2 after extra time following Bobo Balde's red card. It remains Celtic's last European final.
Speaking to The Overlap podcast, 54-year-old Swede Larsson said: “Whenever we didn’t win the league [it was a disapointment] and the biggest one is the European final against Porto. It’s still tough talk about.
"I don't think anybody really will ever get over it. I had a lot of friends down there, my father was down there when he was alive.
"They're saying there was somewhere between 50,000-80,000 [fans].
"I had one of my best friends down walk in the city with my father during the day and they only saw green and white there and they said it was just unbelievable.
"That has to be [the biggest disappointment], the fans and us as a team were worth more."