end of the season to help ensure that Hamburg remained in the Bundesliga. Following Hamburger SV's 2012–13 offseason moves, which saw the transfers of the team's strikers Mladen Petrić and Paolo Guerrero to Fulham and Corinthians respectively, manager Thorsten Fink chose to name Son a starter. The 2012–13 season was a breakthrough season for Son as he scored two goals in an away fixture against Borussia Dortmund on 9 February 2013, helping his team to a 4–1 victory. Son was chosen Mann des Tages (Man of the Match) by kicker. On 14 April, Son netted two goals in a 2–1 win against Mainz 05. He finished the season with 12 goals, becoming the fifth South Korean footballer to achieve double digits in goals in Europe. He finished the 2012–13 season with 12 goals in 34 matches in all competitions. Bayer Leverkusen On 13 June 2013, Bayer Leverkusen confirmed Son's transfer for reportedly €10 million, which was the highest transfer fee in the club's history at the time. He agreed to a five-year deal with the team. Son adjusted quickly to his new club in the pre-season, scoring three goals in his first three appearances for the team in exhibition matches (against 1860 Munich, Udinese and KAS Eupen respectively). On 9 November 2013, Son scored a hat-trick for Leverkusen in a 5–3 win against his former club Hamburgers SV. On 7 December, Son scored a crucial goal against Borussia Dortmund to put his club just four points off the summit of the Bundesliga. On 10 May 2014, Son scored another goal against Werder Bremen ensuring his team a spot for the 2014–15 UEFA Champions League. He finished the 2013–14 season with 12 goals in 43 matches. Son scored a hat-trick against VfL Wolfsburg on 14 February 2015, in a 4–5 defeat, scoring when they were losing 0–3. He finished the 2014–15 season with 17 goals in 42 matches. Son started the 2015–16 season with Bayer Leverkusen. He made a league appearance and a Champions League qualifying match. Tottenham Hotspur 2015–16: Debut season On 28 August 2015, Son joined Premier League club Tottenham Hotspur for £22 million (€30 million) on a five-year contract, subject to work permit and international clearance. Upon his signing, he became the most expensive Asian player in football history. The record had been held since 2001 by Japanese Hidetoshi Nakata, who transferred from Roma to Parma for €25