Serbian FA president and Red Star Belgrade legend Dragan Dzajic admits he still has nightmares about being ripped apart by Jimmy Johnstone at Parkhead.
But he's convinced his former side can stun Celtic in next week's Europa League opener.
Celtic travel to Belgrade for their opening tie in the competition after they face Partick Thistle on Sunday in the Premier Sports Cup quarter final.
Celtic have only once previously played against Red Star Belgrade - in the second round of the European Cup in 1968, having become the first British team to win the trophy the previous year.
Dzajic, who was voted as Yugoslavia's greatest ever player and is still going strong as president of the Serbian FA at 79, has plenty of respect for Celtic ahead of next week's tie.
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But he recalled the game at Parkhead 57 years ago when Johnstone - a nervous flyer - was promised he would be excused from a flight to Belgrade for the second leg if Celtic could build a three-goal advantage...and promptly helped them wallop Red Star 5-1 by scoring twice and providing two assists.
Dzajic said: "I regard Celtic as one of the best and most traditional clubs in the world with a great history.
"And that history includes a game against Red Star where I played.
"When I played, believe me, Celtic were one of the best clubs in Europe.
"They had a player I always remember - Jimmy Johnstone and he was utterly phenomenal that night.
"Cetic were truly a great team.
"They ripped us apart and we were a good team too.
"Of course, things change and Red Star shouldn't be afraid of Celtic now.
"Celtic remain dominant in the Scottish league and they have their own system of play.
"I actually watched their game against Rangers and my impression was they play very specifically and differently from most European clubs. They are solid and physically strong "I am sure the Red Star coach, Vladan Milojevic, watched the game too.
"My opinion is that Red Star can get the better of Celtic if they concentrate on playing their own game.
"I am looking forward to the match."
