Oh said: “I had lost my place in my national team because I was no longer playing for Celtic.
“It was then I knew I had to get a transfer.
“Now I am in a good place here.
“I scored 12 goals in total for Celtic, but I hardly played in the last six months.
“They had brought in a new striker, someone with a different profile – a big, strong boy – and they had to find a solution for me.
“I thought that was a shame at first because I really loved Celtic. It’s a great club.
“But when Genk came calling, I didn’t hesitate.
“I had a few options in the English Championship, but I just wanted to come here.
“When you see all the players who came through here – Kevin De Bruyne, Thibaut Courtois, Leandro Trossard and more. That’s impressive, isn’t it?”