On December 13, 2021, the Badminton World Championships continued in Spain, the Chinese team suffered the first defeat after seven consecutive wins, the men's doubles Zhang Nan / Ou Xuanyi eliminated the Indian team George / Shukla 2-0, the second round against the Malaysian combination Xie Dingfeng / Su Weiyi, Wang Chang / Di Zijian lost 0-2 to the Japanese team Koga Hui / Saito Taiichi, Wang Chang / Di Zijian was out of the first round, ending the first world championship trip of his career.
Wang Chang / Di Zijian is the coaching team to focus on the cultivation of the men's doubles combination, once won the Asian Youth Championship, this year Wang Chang partner Zhou Haodong defeated Li Junhui / Liu Yuchen to win the national championship, now the overall strength of the national feather men's doubles has declined seriously, it is more and more difficult to get results in the competition, veteran Zhang Nan, Liu Chengdu are insisting, leading young players to play, Zhang Nan is the Olympic champion, Liu Cheng is the world champion.
At present, the national feather men's doubles is also accelerating the replacement, especially after the retirement of Li Junhui and Han Chengkai, the highest ranking two pairs of pairs are split, the current number one combination Tan Qiang / He Jiting is not in the top 20, Zhou Haodong has a good performance in the Sudirman Cup, Thomas Cup, partner He Jiting has a good effect, but because the ranking is too low to participate, the next opportunity is estimated that he will have to wait for a long time.
The Japanese combination Koga Kei / Saito Taiichi has played many major competitions, very experienced, both pairs are young combinations, but Koga Hui / Saito Taiichi overall performance is more stable, there is still a gap in comprehensive strength, Wang Chang / Di Zi Ken is too nervous, his own advantages have not been played out at all, lack of competition experience, Koga Hui / Saito Taiichi is now Japan's second men's doubles, second only to Hozuki Shoro / Kobayashi Yugo.
After the start of the game, Koga Kei / Saito Taiichi defended too well, Wang Chang / Di Zi Ken could not find the opportunity, has not been on the ball, Koga Hui / Saito Taiichi led 11-5 into the midfield timeout, after returning Koga Kei / Saito Taiichi fully led, soon 21-9 first.
In the second set, Koga Kei / Saito Taiichi took advantage of the situation and came to the half-time to take an 11-5 lead, Wang Chang / Di Zi Ken backwater battle, Koga Hui / Saito Taiichi extended the point difference to 18-9, Wang Chang / Di Zi Ken chased 13-20, Koga Kei / Saito Taiichi scored to end the match 21-13, 2-0 elimination of Wang Chang / Di Zi Ken advanced to the second round of men's doubles, followed by the Danish combination of Astrup / Rasmussen.
Zhang Nan / Ou Xuanyi eliminated the Indian second combination George / Shukla with 21-15, 21-14, Zhang Nan and Fu Haifeng won the Olympic gold medal, partner Liu Cheng won the World Championship, personal strength is extremely strong, this time he led the young player Ou Xuanyi to strive for another good result, and then challenged the Malaysian combination Xie Dingfeng / Su Wei translation, just this year's Olympic Games Xie Dingfeng / Su Wei translation won the third place.