Ji-sung Park admits he still ponders about a telling decision from the Champions League final in 2011 which Sir Alex Ferguson would later regret.
Beaten by the same opponents two years previously, Manchester United locked horns with Barcelona - and Lionel Messi - at the peak of their powers beneath the famous Wembley arch.
Wayne Rooney gave United hope when he responded to an opener from Pedro, but were, in the end, powerless to stop prime Barca and their mesmeric Argentine talisman, who scored in and was named man of the match for the 3-1 win.
Legendary manager Ferguson later spoke about how he regretted not man-marking Messi in that showpiece. It's a daunting task that would have been handed to Park after he performed a similar role to
Read more on manchestereveningnews.co.uk