2002 FIFA World Cup, and was named to the World Cup all-star team. He was also part of the South Korea under-23 team for the 2004 Summer Olympics, who finished second in Group A, making it through to the next round, before being defeated by Paraguay, the eventual silver medalists. Style of play Yoo was one of South Korea's most versatile players in the 1990s and 2000s. He was originally a defensive player, who could perform roles of stopper and right back with excellent physical strength, but he had the ability to spark attacks with his incisive distribution after getting great positioning and wide vision in his experiences. He could even be deployed as a forward, and he became the top goal-scorer of the league. His versatility allowed him to shine in almost any area of the field from defence to attack, and his presence allowed coach Guus Hiddink to alter tactics easily during World Cup matches. After his retirement, he shocked Koreans by revealing that he was blind in one eye during his career. Managerial career Yoo Sang-chul began managing in 2009 as a high school football manager, at Chuncheon Machinery Technical High School. On 17 July 2011, he was appointed manager of Daejeon Citizen. This was a tough appointment, because a match-fixing scandal caused Daejeon to lose nearly half of their players just before his appointment. Then, in 2012, a relegation system was introduced, threatening the Citizens with relegation. In the 2012 season, while it was close, the Daejeon Citizens managed to avoid relegation. Following the expiration of his contract at the end of the 2012 season, negotiations to extend his contract failed, and the Daejeon Citizens appointed a different manager, a move which many fans found controversial. In January 2014, Yoo became the manager of the Ulsan University football team, the affiliate university team of the Ulsan Hyundai football club where he had spent his entire K-League career. He remained with Ulsan University until December 2017, when he was appointed manager of the Jeonnam Dragons. Under Yoo, the Jeonnam Dragons attempted to reorganize the team around a youth movement. However, the team struggled to score goals, and despite Yoo's request, they were unable to land a better forward. His tenure at Jeonnam Dragons ended on August 16, 2018, when he resigned after only three victories, with the team doing poorly in the 2018 K League 1 standings.