national team in the immediate future so he can rest and mature more as a player. Cho Kwang-rae, then the South Korea head coach, responded by saying that he would continue to call up Son when needed. Son turned down the opportunity to participate in the 2012 London Olympics, opting to concentrate on his club career at Hamburger SV. Son was quoted as saying, "In Korea, an Olympic appearance has a special meaning, but I want to speed up for Hamburg. What matters is to pour all my time into team training." Son did, however, play for the national team in the autumn of 2012 for two 2014 FIFA World Cup qualifiers against Lebanon and Iran, and became a regular call-up in friendlies and World Cup qualifying matches in 2013. In the World Cup qualifier against Qatar on 23 March 2013, Son came on as a substitute in the 81st minute and scored the winning goal in the 96th minute. In June 2014, Son was named in South Korea's squad for the 2014 World Cup. On 22 June, he scored in a 4–2 defeat to Algeria in the team's second group match. The Korea Football Association requested Bayer Leverkusen to allow Son to play in the 2014 Asian Games, as winning the gold medal at the tournament would grant Son exemption from military service. Despite Son affirming his interest and the KFA's efforts, his club at the time, Bayer Leverkusen, refused to release him, as his absence would mean the team would lose him for at least six matches. 2015 Asian Cup Son was selected for South Korea for the 2015 AFC Asian Cup in Australia. At the quarter-final stage, he scored both of the team's goals in the 2–0 extra time defeat of Uzbekistan. In the final against the hosts, he equalised in added time, but his team lost 2–1 after extra time. He was chosen as one of three forwards in the Team of the Tournament. 2016 Summer Olympics In June 2016, Son was named as one of the three overage players in South Korea under-23 squad for the 2016 Summer Olympics. Son amassed two goals in the group stages with a goal against Fiji and another against Germany, helping his team to top the group with two wins and a draw. South Korea was eliminated by Honduras in the quarterfinals, with Son missing crucial chances. 2018 World