Park played his last match in professional football at the weekend.
The South Korean icon received a hero's farewell during Friday's K League Classic All-Star Game and scored his last-ever goal before predictably winning the Man of the Match award following an entertaining 6-6 draw at the Seoul World Cup Stadium.
"I remember him as a big-game player," Fletcher told manutd.com. "When the big games came around, against the likes of Arsenal and the big Champions League sides, he always stepped up to the plate. He was a great team-mate and a real humble lad in the dressing room. He just went about his job diligently.
"For such a big star in Asia - and he really is a superstar there - he never acted that way at all. He was always professional and a great player. I'd say he was an underrated player, too. People talk about his work-rate but technically he was very good as well.
"He could use his left and his right foot, he received the ball very well, he was strong and was the ultimate team player," Darren continued. "He would sacrifice himself for the greater good of the team. The more players you have on your side like Ji-sung Park the more chance you have of being successful."
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