The performance of the 22 year old Korea international earned him the praise of boss Neil Lennon.
“Ki has been very consistent over the past 18 months. He's developing nicely into a class player," Lennon told The Telegraph.
"He had good presence and good composure on the ball. He has a goal or two in him and his passing range is excellent."
Lennon added the former FC Seoul youngster has the potential to be a great player.
"He's a very important player to us. I rate him very highly. He can go on to be anything he wants to be," Lennon said.
"We think he is a class player and we're glad he's here.”