Celtic star Yang Hyun-jun admits he's still not over South Korea's World Cup disaster.
And it's made him doubly determined to bring Asian Games success to his country instead.
The 24-year-old helped South Korea to a 4-1 win in their opening game in the tournament against Qatar.
Yang was a part of the South Korean squad that flopped at the World Cup in the summer, after they crashed out in the group stages following two defeats to Mexico and South Africa after winning their opening game against the Czech Republic.
And he accepts he still carries the scars from that disappointment. Yang said: "I am still very upset with our results at the World Cup. I remain very frustrated about it.
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But the only way to try and make it up to our supporters is to win this Asian Cup and bring back joy to the fans. The entire team is united with the single goal of a gold medal, and the manager here has the same mindset.
There are so many young players here with a lot of potential, and I believe they can use this tournament as a stepping stone to grow into the senior national team in the future, and they can help revitalise Korean football."
However, despite providing an assist in the opening game, Yang insisted he was not happy with his own display. He said: "Honestly, I wasn't satisfied with my individual performance. I missed a lot of chances, and I made too many mistakes more often than I expected, so I need to improve my concentration.
"I need to be more active on the wings and provide more of a threat. Personally, I need to reduce my mistakes, make more sacrifices for the team, and run an extra mile.
"I was disappointed to lose a goal against Qatar, but if we can improve our concentration, we are fully capable of winning."