Shay Given was 'praying to God' that he didn't come off the bench for Celtic against Rangers at 17 years of age.
The Irish goalkeeper was among the substitutes when the Parkhead club took on their city rivals in the 1990s.
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Given came through the youth ranks at Celtic but never made a senior appearance in green and white.
He was asked on Thursday if there is a sense of 'what if' regarding his time in Glasgow's east end: "Yeah, there is," said Given.
"I was on the bench once for an Old Firm game when I was 17, praying to God that Packie Bonner wasn't going to get injured because I was going to have to come off the bench at 17. I would have been a nervous wreck, if I'm being brutally honest.
"But even just driving up the road there past Barrowfield, I remember we had to change here at the stadium, and I had to run down the road as an apprentice and train. The first team boys were driving past, blowing the horn and stuff. It's just all the memories come flooding back.
"But yeah, some great memories. The club's changed so much since I was here at 16 until 18. Even the stadium, look around the stadium now, it's just phenomenal.
"I was here when the old jungle was there across from the dugout. The way the club has moved forward and moved on, it's a phenomenal club now. It's a totally different animal, as such, but it's great to see how the club has progressed.
"But yeah, it always brings back a special feeling coming back here, definitely."