Japan's back-to-back world champion Akane Yamaguchi added a first BWF World Tour Finals title to her collection ©Getty Images

World champions Viktor Axelsen of Denmark and Akane Yamaguchi of Japan rounded off their seasons by claiming the singles title at the Badminton World Federation (BWF) World Tour Finals in Bangkok.

Olympic and world champion Axelsen capped off a dominant season with his sixth BWF World Tour victory of the campiagn, defending his men's singles title with a straight-games victory against Tokyo 2020 bronze medallist Anthony Sinisuka Ginting of Indonesia at the Nimibutr Arena.

Having been required to come from a game behind to win his semi-final against Japan's Kodai Naraoka yesterday, Axelsen enjoyed a more comfortable decider, which was settled inside 46 minutes 21-13, 21-14 in his favour.

In the women's singles final, back-to-back world champion Yamaguchi became the first player since 1997 to triumph at the All England Open, World Championships and end-of-season finals in the same year.

She won two tight games against Chinese Taipei's Olympic silver medallist Tai Tzu-ying 21-18 and 22-20 to emerge victorious.

The doubles titles were also settled on the final day in the Thai capital.

China's Olympic silver medallist Liu Yuchen paired with Ou Xuanyi to take gold in the men's event, beating Indonesia's Mohammad Ahsan and Hendra Setiawan 21-17, 19-21, 21-12.

Chen Qingchen and Jia Yifan, runners-up for China at Tokyo 2020, denied hosts Thailand success in the women's doubles as they overcame Benyapa Aimsaard and Nuntakarn Aimsaard 21-13, 21-14.

Another Chinese pairing in Olympic silver medallists Zheng Siwei and Huang Yaqiong prevailed over home favourites Dechapol Puavaranukroh and Sapsiree Taerattanachai in a 21-19, 18-21, 21-13 mixed doubles success.