Two stoppage time goals against Bayern Munich, including the winner from Solskjaer, saw the Red Devils complete one of the greatest comebacks in European football history at the Nou Camp 20 years ago.
And the Norwegian will return to Barcelona with United, this time as manager, as he attempts to overcome the odds once more and eliminate the irrepressible Spanish champions in the quarter-finals.
United set up the Barcelona clash with a miraculous comeback victory over Paris Saint-Germain in the previous round – and Smalling explains how the spirit of ’99 inspires the current squad.
The England international told talkSPORT: “The fact that he’s been there, done that and now he’s our manager… he’s able to share his insight in certain situations because ultimately that Champions League campaign [1998/99] had some blips along the way.
“Having what he’s gone through, for us, is a massive boost.
“He used it before PSG and before a couple of big games. That’s what we want to hear, we want to hear stories and he’s very good at telling things that he’s been through with Sir Alex [Ferguson] and as a player.
“To hear those is massive inspiration for all of us and helps lead to the comebacks that we’ve had.”