The South Korea international spoke candidly with reporters upon his return to his homeland discussing his Hoops future and personal opinion of his transfer value
The 23-year-old arrived back in South Korea this week after completing a title-winning season with Celtic where he made 41 appearances in all competitions, scoring seven goals.
Ki has been linked with a long list of clubs in the past including Tottenham, Blackburn and several top Russian teams, however speaking to reporters at Incheon International Airport he said he needed to ponder his future during the off-season.
"Since the season is now over, it’s about time to think deeply about my future," Ki told reporters.
"First, I need to take a rest since I’m tired both physically and mentally. I know I don’t have much time left to play in Europe. I will need to make my decision very carefully."
Ki revealed if he were to move it would only be to a club where he was guaranteed regular first-team football.
"It has to be a team that I can play for. If I can play on the pitch, it doesn’t matter which league it is," he said.
"I think I’ve grown up after playing in the SPL. Even if it’s not a “big league,” if I can just play, I will be able to develop myself more and get more good experiences."
Celtic boss Neil Lennon had said in January that his South Korean midfielder was worth £10 million (€12m) however Ki refused to be drawn in discussing his value.
"My team will evaluate my value. Personally, I don’t think I’m a 10 million pound player. But if I had to move, I think it would be better to have a high transfer fee," he said.