Kim Yu-na practices for the World Championships at Budweiser Gardens in London, Ontario on Tuesday. /Newsis

Canada is like a second home to Kim Yu-na. She trained in Toronto for four years after her 2006 debut in the senior circuit and became the first Korean figure skater to win gold at the 2010 Vancouver Olympics. Now, her first World Championships after a two-year break are being held in London, Ontario, this week, about 190 km from Toronto.

"[Canada] is like a second home, so it feels familiar and comfortable," Kim said on Sunday before leaving for the country.

She had her first practice in London on Tuesday, and checked her form by running through her free skate program "Les Misérables" at the main rink, Budweiser Gardens. She performed an array of jumps, including her signature triple-lutz and triple toe-loop combination, without mistakes.

At the event, Kim had a brief encounter with former coach Brian Orser, from whom she had a bitter split back in 2010. But when asked by Korean reporters whether he still had hard feelings, Orser said no and added that he exchanged greetings with Kim.

He also said he watched videos of Kim's performances in the NRW Trophy and Korean nationals and was confident that she would perform well again so long as she remains focused.