to Danes and world no.1 Mathias Boe and Carsten Mogensen 21–15, 18–21, 18–21. In doing so, they failed to win their second All England Open title. 2012 Tan competed at the 2012 Olympics with Koo Kien Keat, reaching the semi-finals, and losing 0–2 in the bronze medal match to the Koreans. 2013 Tan and Koo suffered a lot of early round exits in 2013 and a three-year major title drought but they managed to remain in the top 5 of the world ranking. 2014 As of March 2014, following the resignation of his partner, Koo Kien Keat, which was due to their deteriorating performance, Tan was scratch partnered with several men's doubles players including Goh V Shem, Ow Yao Han, Hoon Thien How and Tan Wee Kiong. Following the tournament, Tan has been officially re-partnered with Hoon Thien How. In August that year, Koo returned to play his last tournament with Tan at the 2014 BWF World Championships. Their last match together was in the third round where they lost to a Chinese Taipei pair with a score of 19–21 in the deciding game. 2015 In early 2015, Tan announced his resignation from the Badminton Association of Malaysia. Koo and Tan announced that they are coming out of retirement and try to qualify for the 2016 Rio Olympics before they call it quits for good. They are currently sponsored by Seri Mutiara Development Sdn Bhd. They have achieved some breakthroughs this year. Winning the Dutch Open and runners-up in the Thailand Open. They have also made it to 2 Superseries quarterfinals in Australia and Korea. 2016 In 2016, Koo and Tan managed to enter the top 15 of the world rankings. However, due to the new Olympic qualification requirement set by the BWF whereby each country can send two representatives for each event only if they are both in the top 8 of the world rankings in their discipline and if they are not then only the highest ranked representative will contest, Koo and Tan narrowly failed to qualify for the Olympics. 2017 Tan and Hendra Setiawan debut tournament at the 2017 Syed Modi International, they managed to advance until the quarter-finals. They reached the final round at the Australian Open but were beaten by third seed Takeshi Kamura and Keigo Sonoda from Japan. 2018 Tan was partner with Yoo Yeon Seong from South Korea. Subsequently, he was partner with