Anton Kallberg of Sweden serves during the men's singles round of 32 match between Fan Zhendong of China and Anton Kallberg of Sweden at 2020 ITTF Qatar Open in Doha, Qatar, March 5, 2020. (Photo by Nikku/Xinhua)

Ma Long of China hits a return during the men's singles round of 32 match between Ma Long of China and Morizono Masataka of Japan at 2020 ITTF Qatar Open in Doha, Qatar, March 5, 2020. (Photo by Nikku/Xinhua)

Morizono Masataka of Japan hits a return during the men's singles round of 32 match between Ma Long of China and Morizono Masataka of Japan at 2020 ITTF Qatar Open in Doha, Qatar, March 5, 2020. (Photo by Nikku/Xinhua)

Xu Chenhao of China hits a return during the men's singles round of 32 match between Xu Chenhao of China and Patrick Franziska of Germany at 2020 ITTF Qatar Open in Doha, Qatar, March 5, 2020. (Photo by Nikku/Xinhua)

Fan Zhendong of China hits a return during the men's singles round of 32 match between Fan Zhendong of China and Anton Kallberg of Sweden at 2020 ITTF Qatar Open in Doha, Qatar, March 5, 2020. (Photo by Nikku/Xinhua)

Andrej Gacina of Croatia serves during the men's singles round of 32 match between Liang Jingkun of China and Andrej Gacina of Croatia at 2020 ITTF Qatar Open in Doha, Qatar, March 5, 2020. (Photo by Nikku/Xinhua)

Chen Xingtong of China hits a return during the women's singles round of 32 match between Chen Xingtong of China and Lee Ho Ching of Hong Kong of China at 2020 ITTF Qatar Open in Doha, Qatar, March 5, 2020. (Photo by Nikku/Xinhua)

Lee Ho Ching of Hong Kong of China hits a return during the women's singles round of 32 match between Chen Xingtong of China and Lee Ho Ching of Hong Kong of China at 2020 ITTF Qatar Open in Doha, Qatar, March 5, 2020. (Photo by Nikku/Xinhua)

Qian Tianyi of China hits a return during the women's singles round of 32 match between Qian Tianyi of China and Doo Hoi Kem of Hong Kong of China at 2020 ITTF Qatar Open in Doha, Qatar, March 5, 2020. (Photo by Nikku/Xinhua)

Frane Kojic of Croatia serves during the men's singles round of 32 match between Xu Xin of China and Frane Kojic of Croatia at 2020 ITTF Qatar Open in Doha, Qatar, March 5, 2020. (Photo by Nikku/Xinhua)

Ma Long (R)/Xu Xin of China compete during the men's doubles round of 16 match between Ma Long/Xu Xin of China and Anton Kallberg/Jon Persson of Sweden at 2020 ITTF Qatar Open in Doha, Qatar, March 5, 2020. (Photo by Nikku/Xinhua)

Marcos Freitas of Portugal hits a return during the men's singles round of 32 match between Wang Chuqin of China and Marcos Freitas of Portugal at 2020 ITTF Qatar Open in Doha, Qatar, March 5, 2020. (Photo by Nikku/Xinhua)

Doo Hoi Kem of Hong Kong of China hits a return during the women's singles round of 32 match between Qian Tianyi of China and Doo Hoi Kem of Hong Kong of China at 2020 ITTF Qatar Open in Doha, Qatar, March 5, 2020. (Photo by Nikku/Xinhua)

Ma Long (R, top)/Xu Xin of China compete during the men's doubles round of 16 match between Ma Long/Xu Xin of China and Anton Kallberg/Jon Persson of Sweden at 2020 ITTF Qatar Open in Doha, Qatar, March 5, 2020. (Photo by Nikku/Xinhua)

Fan Zhendong/Wang Chuqin (front) of China compete during the men's doubles round of 16 match between Fan Zhendong/Wang Chuqin of China and Aleksandar Karakasevic (Serbia)/Lubomir Pistej (Slovakia) at 2020 ITTF Qatar Open in Doha, Qatar, March 5, 2020. (Photo by Nikku/Xinhua)

Harimoto Tomokazu of Japan hits a return during the men's singles round of 32 match between Harimoto Tomokazu of Japan and Chuang Chih-Yuan of Chinese Taipei at 2020 ITTF Qatar Open in Doha, Qatar, March 5, 2020. (Photo by Nikku/Xinhua)

Liang Jingkun of China hits a return during the men's singles round of 32 match between Liang Jingkun of China and Andrej Gacina of Croatia at 2020 ITTF Qatar Open in Doha, Qatar, March 5, 2020. (Photo by Nikku/Xinhua)

Chuang Chih-Yuan of Chinese Taipei hits a return during the men's singles round of 32 match between Harimoto Tomokazu of Japan and Chuang Chih-Yuan of Chinese Taipei at 2020 ITTF Qatar Open in Doha, Qatar, March 5, 2020. (Photo by Nikku/Xinhua)

(200306) -- DOHA, March 6, 2020 (Xinhua) -- Sun Mingyang of China hits a return during the women's singles round of 32 match between Wang Manyu of China and Sun Mingyang of China at 2020 ITTF Qatar Open in Doha, Qatar, March 5, 2020. (Photo by Nikku/Xinhua)

(200306) -- DOHA, March 6, 2020 (Xinhua) -- Stefanie Christensen (Denmark)/Nathalie Marchetti (R, Belgium) compete during the women's doubles round of 16 match between Ding Ning/Chen Meng of China and Stefanie Christensen (Denmark)/Nathalie Marchetti (Belgium) at 2020 ITTF Qatar Open in Doha, Qatar, March 5, 2020. (Photo by Nikku/Xinhua)

(200306) -- DOHA, March 6, 2020 (Xinhua) -- Ding Ning (L)/Chen Meng of China compete during the women's doubles round of 16 match between Ding Ning/Chen Meng of China and Stefanie Christensen (Denmark)/Nathalie Marchetti (Belgium) at 2020 ITTF Qatar Open in Doha, Qatar, March 5, 2020. (Photo by Nikku/Xinhua)