Sir Alex Ferguson knew the 1999 Champions League final was far from done after Manchester United's dramatic equaliser against Bayern Munich.
United return to the Nou Camp on Tuesday night almost 20 years after they sealed the Treble with a stunning victory against Bayern.
The Red Devils trailed Bayern to an early Mario Basler goal and appeared to be heading for defeat until substitute Teddy Sheringham fired home in the first minute of injury time.
United looked favourites to progress in extra time but assistant boss Steve McClaren insists Ferguson knew there was another twist to come.
"I remember saying to him, gaffer it looks like extra-time now, could we get back into some kind of shape and not take so many risks," McClaren told the Mail.
Barcelona vs Man Utd: The major tactical conundrum facing Ole Gunnar Solskjaer
"He looked at me and said: 'Steve, sit down, this game ain't over yet'. Sixty seconds later, we know what happened. I thought we had another half-hour but Ole stopped that. What a shame!"
Ole Gunnar Solskjaer delivered a dramatic winner for United to spark wild scenes on the pitch and on the United bench.
The Norwegian returns to the scene of his greatest triumph on Tuesday night as he looks to take United into the last four of the competition.
Ferguson has travelled with the United squad and McClaren has also opened up on the inspiring team talk the Scot gave before kick-off at the Nou Camp.
Barcelona vs Man Utd predictions: Experts look ahead to Champions League second leg
The former England boss added: "'I did the coaching but the gaffer was the master on match day. His team talk was based on emotion rather than tactical details - why this was the greatest game of their lives.
"He said it was like flying to moon, not many people get the chance, not many people even want to do it, but tonight they could fly to the moon. Were the players ready after that? Damn right, they were ready. The hairs on the back of my neck were standing up as well."
