The South Korean star was voted Player of the Month for March by the United supporters.
“I know I can improve, especially in the goals department,” he told United’s official website.
“I’d like to thank all the fans who voted for me and I promise I’ll do my best and try to perform even better during the last few months of the season.
“It’s the first time I’ve won Player of the Month since joining United and I agree that this season has been one of the best on a personal level.
“The best thing in March is that we progressed to the Champions League quarter finals. The worst moments were losing against Liverpool and Fulham.”