after winning the 2015 BWF World Championships in their home country. They defeated Lee and Yoo in straight games in the semi-finals and in the final, they defeated the Chinese pair of Liu Xiaolong and Qiu Zihan 21–17, 21–14. After the World Championships, they were unable to win a title for the rest for the year, with their best results being semi-finalists at the French Open and Hong Kong Open. Setiawan and Ahsan won their second season-ending title at the Dubai World Superseries Finals after defeating Chai Biao and Hong Wei in the final. Setiawan opened the 2016 season by winning the Thailand Masters with Mohammad Ahsan. He played at the Asia Team Championships, and led the Indonesia team to the finals. In the finals, Indonesia won the title after beating Japan in the final. Later, Setiawan and Ahsan competed at the Thomas Cup, and the team finished runner-up to Denmark. In August, Setiawan made his second appearance at the Olympic Games by competing in Rio 2016. Partnering with Ahsan as the second seed, the duo were eliminated in the group stage. While competing in 2016 with Ahsan, the pair's performance showed a decline compared to previous years, resulting in the Badminton Association of Indonesia deciding to split up the pair in the end of the 2016 season, each of them focusing on their individual careers with different partners. Setiawan tried to pair up with Rian Agung Saputro and Berry Angriawan, but the pairs did not perform up to standard and failed to deliver results. On 14 November, Setiawan announced his retirement from the national team, and left the team on 1 December. 2017: Partnership with Tan Boon Heong After leaving the national team and playing as an independent player, he partnered up with his former rival, Tan Boon Heong, from Malaysia in 2017. They reached a career-high-rank of 20th on 30th November 2017. The only final the duo made was in the Australian Open, where they lost to Takeshi Kamura and Keigo Sonoda of Japan, 17–21, 19–21. They split up after Setiawan was denied by PBSI of playing together with Tan in the 2018 World Championships. 2018–2019: Regrouping with Ahsan; second All England title and fourth World Championships title In 2018, Setiawan rejoined the Indonesia national training squad as an internship player. He first paired with Rian Agung Saputro to compete at the Indonesia Masters, but the duo were