Tokyo 2020 Olympics - Badminton - Men's Singles - Group Stage - MFS - Musashino Forest Sport Plaza, Tokyo, Japan – July 27, 2021. Kai Schaefer of Germany holds a shuttlecock during the match against Toby Penty of Britain. REUTERS/Leonhard Foeger

Tokyo 2020 Olympics - Badminton - Men's Singles - Group Stage - MFS - Musashino Forest Sport Plaza, Tokyo, Japan – July 27, 2021. Raul Must of Estonia eyes the shuttlecock during the match against Pablo Abian of Spain. REUTERS/Leonhard Foeger

Tokyo 2020 Olympics - Badminton - Men's Singles - Group Stage - MFS - Musashino Forest Sport Plaza, Tokyo, Japan – July 26, 2021. Loh Kean Yew of Singapore eyes the shuttlecock during the match against Aram Mahmoud of the Refugee Olympic Team. REUTERS/Leonhard Foeger

Tokyo 2020 Olympics - Badminton - Men's Singles - Group Stage - MFS - Musashino Forest Sport Plaza, Tokyo, Japan – July 26, 2021. A shuttlecock flies over the net during the match between Heo Kwang-Hee of South Korea and Timothy Lam of the United States. REUTERS/Hannah Mckay

Tokyo 2020 Olympics - Badminton - Men's Singles - Group Stage - MFS - Musashino Forest Sport Plaza, Tokyo, Japan – July 26, 2021. Heo Kwang-Hee of South Korea holds a shuttlecock during the match against Timothy Lam of the United States. REUTERS/Hannah Mckay

Tokyo 2020 Olympics - Badminton - Men's Singles - Group Stage - MFS - Musashino Forest Sport Plaza, Tokyo, Japan – July 26, 2021. Heo Kwang-Hee of South Korea holds a shuttlecock and racket during the match against Timothy Lam of the United States. REUTERS/Hannah Mckay

Tokyo 2020 Olympics - Badminton - Men's Singles - Group Stage - MFS - Musashino Forest Sport Plaza, Tokyo, Japan – July 26, 2021. Heo Kwang-Hee of South Korea eyes the shuttlecock during the match against Timothy Lam of the United States. REUTERS/Hannah Mckay

Tokyo 2020 Olympics - Badminton - Women's Singles - Group Stage - MFS - Musashino Forest Sport Plaza, Tokyo, Japan – July 26, 2021. Daniela Macias of Peru eyes the shuttlecock during the match against Kristin Kuuba of Estonia. REUTERS/Hannah Mckay

Tokyo 2020 Olympics - Badminton - Men's Singles - Group Stage - MFS - Musashino Forest Sport Plaza, Tokyo, Japan – July 26, 2021. Kevin Cordon of Guatemala picks up a shuttlecock during the match against Lino Munoz of Mexico. REUTERS/Leonhard Foeger

Felix Hassebroek looks through the fence into neighbors yard searching for a lost shuttlecock on Memorial Day weekend during the outbreak of coronavirus disease (COVID-19) in Brooklyn, New York, U.S., May 25, 2020. REUTERS/Caitlin Ochs

Badminton - 2018 Asian Games - Women's Singles - Final - GBK Istora - Jakarta, Indonesia - August 28, 2018. Tai Tzuying of Taiwan looks at the shuttlecock during match against V.Sindhu Pusarla of India. REUTERS/Athit Perawongmetha

Badminton - 2018 Asian Games - Women's Team Final - Japan vs China - Gelora Bung Karno Sports Complex - Jakarta, Indonesia - August 22, 2018. Huang Dongping of China looks on as compatriot Zheng Yu goes for the shuttlecock during match action against Misaki Matsutomo and Ayaka Takahashi of Japan. REUTERS/Beawiharta

A man jumps to hit a shuttlecock inside a public park on a foggy winter morning in Kolkata, India, January 21, 2018. REUTERS/Rupak de Chowdhuri TPX IMAGES OF THE DAY

A man jumps to hit a shuttlecock inside a public park on a foggy winter morning in Kolkata, India, January 21, 2018. REUTERS/Rupak de Chowdhuri

People kick a shuttlecock outside the headquarters of the New Oriental Education & Technology Group in Beijing, China, November 25, 2016. To match Special Report COLLEGE-CHARITIES/ REUTERS/Thomas Peter

2016 Rio Olympics - Badminton - Women's Singles Group Play - Riocentro - Pavilion 4 - Rio de Janeiro, Brazil - 14/08/2016. Xiaoyu Liang (SIN) of Singapore eyes the shuttlecock during play against Sung Ji-Hyun (KOR) of South Korea. TSRIO2016 REUTERS/Jeremy Lee FOR EDITORIAL USE ONLY. NOT FOR SALE FOR MARKETING OR ADVERTISING CAMPAIGNS.

Thailand's badminton player Ratchanok Intanon (C), who hopes to win gold at the Rio Olympics, collects shuttlecocks after an afternoon training session at a gym in Bangkok, Thailand, June 22, 2016. Picture taken June 22, 2016. REUTERS/Athit Perawongmetha

A boy tries to hit a shuttlecock with a wooden bat at a slum in Mumbai, India, June 29, 2016. REUTERS/Danish Siddiqui

Vietnam's Olympic badminton player Nguyen Tien Minh takes part in a training session in Hanoi, Vietnam May 31, 2016. REUTERS/Kham

Badminton - Singapore Open 2016 - Men's Singles Round of 16 - Singapore 14/4/16. Boonsak Ponsana of Thailand looks at the shuttlecock after losing a point to Chen Long of China. REUTERS/Edgar Su

A person wearing a shuttlecock outfit greets people during the Brasil Open badminton competition at the Riocentro convention centre in Rio de Janeiro, Brazil, November 25, 2015. The Brasil Open 2015 is a test event for the Rio 2016 Olympic Games. REUTERS/Pilar Olivares

Denmark's Christinna Pedersen watches as Kamilla Juhl (top) hits a return to China's Tian Qing and Zhao Yunlei during their final women's doubles badminton match at the BWF World Championships in Jakarta, August 16, 2015. REUTERS/Nyimas Laula

Indonesia's Mohammad Ahsan (L) and Hendra Setiawan hit a return against China's Qiu Zihan and Liu Xiaolong during their final men's double badminton match at the BWF World Championships in Jakarta, August 16, 2015. REUTERS/Nyimas Laula

Malaysia's Lee Chong Wei hits a return to China's Chen Long during their men's singles finals badminton match at the BWF World Championships in Jakarta, August 16, 2015. REUTERS/Beawiharta

Malaysia's Lee Chong Wei eyes the shuttlecock as he hits a return to Denmark's Jan O. Jorgensen during their semi-final men's singles badminton match at the BWF World Championship in Jakarta, Indonesia August 15, 2015. REUTERS/Beawiharta

Malaysia's Lee Chong Wei hits a return to Denmark's Jan O. Jorgensen during their semi-final men's singles badminton match at the BWF World Championship in Jakarta, Indonesia August 15, 2015. REUTERS/Beawiharta

Denmark's Viktor Axelsen returns a shot from China's Chen Long during their quarter-final men's singles badminton match at the BWF World Championship in Jakarta, Indonesia August 14, 2015. REUTERS/Nyimas Laula

Spain's Carolina Marin returns a shot from China's Wang Shixian during her quarter-final women's singles badminton match at the BWF World Championship in Jakarta, Indonesia August 14, 2015. REUTERS/Nyimas Laula

China's Chen Long returns a shot from Denmark's Viktor Axelsen during their quarter-final men's singles badminton match at the BWF World Championship in Jakarta, Indonesia August 14, 2015. REUTERS/Nyimas Laula

Japan's Kento Momota watches the shuttlecock during his quarter-final men's singles badminton match against Hong Kong's Wei Nan at the BWF World Championship in Jakarta, Indonesia August 14, 2015. REUTERS/Nyimas Laula

Indonesia's Lindaweni Fanetri returns a shot to Thailand's Ratchanok Intanon during their women's singles badminton match at the BWF World Championship in Jakarta, Indonesia, August 13, 2015. REUTERS/Darren Whiteside

Thailand's Ratchanok Intanon returns a shot to Indonesia's Lindaweni Fanetri during their women's singles badminton match at the BWF World Championship in Jakarta, Indonesia, August 13, 2015. REUTERS/Darren Whiteside

Malaysia's Lee Chong Wei returns a shot from China's Wang Zhengming during their men's singles badminton match at the BWF World Championship in Jakarta, Indonesia, August 13, 2015. REUTERS/Nyimas Laula

China's Lin Dan returns a shot from Denmark's Hans-Kristian Vittinghus during their men's singles badminton match at the BWF World Championship in Jakarta, Indonesia, August 13, 2015. REUTERS/Nyimas Laula

Malaysia's Lee Chong Wei returns a shot from China's Wang Zhengming during their men's singles badminton match at the BWF World Championship in Jakarta, Indonesia, August 13, 2015. REUTERS/Nyimas Laula

Thailand's Ratchanok Intanon serves to Indonesia's Lindaweni Fanetri during their women's singles badminton match at the BWF World Championship in Jakarta, Indonesia, August 13, 2015. REUTERS/Darren Whiteside

Denmark's Hans-Kristian Vittinghus returns a shot from China's Lin Dan during their men's singles badminton match at the BWF World Championship in Jakarta, Indonesia August 13, 2015. REUTERS/Darren Whiteside

China's Lin Dan returns a shot from Denmark's Hans-Kristian Vittinghus during their men's singles badminton match at the BWF World Championship in Jakarta, Indonesia August 13, 2015. REUTERS/Darren Whiteside

China's Lin Dan returns a shot from Denmark's Hans-Kristian Vittinghus during their men's singles badminton match at the BWF World Championship in Jakarta, Indonesia August 13, 2015. REUTERS/Darren Whiteside

China's Lin Dan returns a shot from Denmark's Hans-Kristian Vittinghus during their men's singles badminton match at the BWF World Championship in Jakarta, Indonesia August 13, 2015. REUTERS/Darren Whiteside

Korea's Lee So-hee (L) returns a shot as partner Shin Seung-chan looks on during their women's doubles badminton match against Denmark's Christinna Pedersen and Kamilla Rytter Juhl at the BWF World Championship in Jakarta, Indonesia August 13, 2015. REUTERS/Nyimas Laula

India's Saina Nehwal returns a shot from Japan's Sayaka Takahashi during their women's singles badminton match at the BWF World Championship in Jakarta, Indonesia August 13, 2015. REUTERS/Nyimas Laula

Japan's Sayaka Takahashi returns a shot from India's Saina Nehwal during their women's singles badminton match at the BWF World Championship in Jakarta, Indonesia August 13, 2015. REUTERS/Nyimas Laula

Japan's Sayaka Takahashi returns a shot from India's Saina Nehwal during their women's singles badminton match at the BWF World Championship in Jakarta, Indonesia August 13, 2015. REUTERS/Nyimas Laula

South Korea's Son Wan-ho returns a shot during his men's singles badminton match against Denmark's Jan O Jorgensen at the BWF World Championship in Jakarta, Indonesia August 13, 2015. REUTERS/Darren Whiteside

South Korea's Son Wan-ho returns a shot during his men's singles badminton match against Denmark's Jan O Jorgensen at the BWF World Championship in Jakarta, Indonesia August 13, 2015. REUTERS/Darren Whiteside

Denmark's Jan O Jorgensen returns a shot during his men's singles badminton match against South Korea's Son Wan-ho at the BWF World Championship in Jakarta, Indonesia August 13, 2015. REUTERS/Darren Whiteside

Denmark's Jan O Jorgensen returns a shot during his men's singles badminton match against South Korea's Son Wan-ho at the BWF World Championship in Jakarta, Indonesia August 13, 2015. REUTERS/Darren Whiteside

Indonesia's Tontowi Ahmad (back) and Liliyana Natsir (front) watch the shuttle fly over the net during their mixed doubles badminton match against Malaysia's Goh Liu Ying and Chan Peng Soon at the BWF World Championship in Jakarta, Indonesia August 13, 2015. REUTERS/Nyimas Laula

Malaysia's Goh Liu Ying returns a shot as her partner Chan Peng Soon looks during their mixed doubles badminton match against Indonesia's Tontowi Ahmad and Liliyana Natsir at the BWF World Championship in Jakarta, Indonesia August 13, 2015. REUTERS/Nyimas Laula

India's P.V. Sindhu returns a shot during her match against China's Li Xuerui at the BWF World Championship in Jakarta, Indonesia August 13, 2015. REUTERS/Darren Whiteside

India's P.V. Sindhu returns a shot during her match against China's Li Xuerui at the BWF World Championship in Jakarta, Indonesia August 13, 2015. REUTERS/Darren Whiteside

China's Chen Long returns a shot to Thailand's Tanongsak Saensomboonsuk during their singles match at the BWF World Championship in Jakarta, Indonesia August 13, 2015. REUTERS/Nyimas Laula

China's Chen Long returns a shot to Thailand's Tanongsak Saensomboonsuk during their singles match at the BWF World Championship in Jakarta, Indonesia August 13, 2015. REUTERS/Nyimas Laula

Taiwan's Pai Yu Po reacts as the shuttle cock is stuck in the net during her match with Spain's Carolina Marin at the BWF World Championship in Jakarta, Indonesia August 13, 2015. REUTERS/Nyimas Laula

Spain's Carolina Marin returns a shot to Taiwan's Pai Yu Po during their women's single badminton match at the BWF World Championship in Jakarta, Indonesia August 13, 2015. REUTERS/Darren Whiteside

Japan's Kento Momota returns a shot to Vietnam's Nguyen Tien Minh during their men's single badminton match at the BWF World Championship in Jakarta, Indonesia August 13, 2015. REUTERS/Darren Whiteside

Japan's Kento Momota returns a shot to Vietnam's Nguyen Tien Minh during their men's single badminton match at the BWF World Championship in Jakarta, Indonesia August 13, 2015. REUTERS/Darren Whiteside

Spain's Carolina Marin returns a shot to Taiwan's Pai Yu Po during their women's single badminton match at the BWF World Championship in Jakarta, Indonesia August 13, 2015. REUTERS/Darren Whiteside

Thailand's Boonsak Ponsana returns a shot during his men's singles badminton match against Denmark's Jan O Jorgensen at the BWF World Championship in Jakarta, Indonesia, August 11, 2015. REUTERS/Nyimas Laula