at the Sudirman Cup, and prevented a clean sweep from Denmark, as he and Alvent Yulianto beating the current world number 1 Mathias Boe and Carsten Mogensen in straight games, but Indonesia lost 1–3 in the semifinals tie. In August, Ahsan and Septano captured the bronze medal at the BWF World Championships. The duo then reached their first final of the year in the Japan Open, but lost to current World Champions Cai Yun and Fu Haifeng. They managed to win their first title of the year, by defend the Indonesia Grand Prix Gold title, and then won the gold medals in the men's team and doubles events in the Southeast Asian Games. Another results for Ahsan and Septano in the rest of 2011 season were the quarter-finalists in the China Masters, French, and Macau Opens. They qualified to compete in the Super Series Finals in Liuzhou, China, but their pace at that tournament were stopped in the group stage. 2012–2013: Beginning of Ahsan and Setiawan partnership, World champions, and number 1 In 2012, Ahsan and Septano partnership did not show satisfactory results, since they were unable to win any international tournaments, up to 2012 London Olympics when they were only able to finished the tournament as a quarter-finalists. In September, he played at the National Games for Central Java, and claimed two gold medals in the men's doubles and team events, and also a bronze in the mixed doubles. Ahsan then formed a new partnership with his senior, Hendra Setiawan. Ahsan and Setiawan debut were quite good as they finished as semi-finalists in the Denmark Open. Ahsan and Setiawan campaign in 2013 looks promising. In January, they clinched their first title as a pair in the Malaysia Open, beating the Korean pair Ko Sung-hyun and Lee Yong-dae in the final. They later won five tournaments in a row, started in the Australia Open in April; the Indonesia and Singapore Opens in June, with another victory against Ko and Lee in both tournaments; the BWF World Championships in August; and later at the Japan Open in September. At the World Championships, they won the title without dropping a single game to their opponents on the way to the final. Their winning streak then stopped by youngster compatriot Ronald Alexander and Selvanus Geh in the quarter-finals of the Indonesia Grand Prix Gold. They then suffered back-to-back losses to Lee yong-dae with