Naoaki Yamamoto (L, bottom)/ Erina Otsuka (R, bottom) of Japan compete during the beach tennis Mixed Doubles Round of 32 match between Naoaki Yamamoto/Erina Otsuka of Japan and Sultan Al-Alawi/Mubaraka Al Naimi of Qatar at the 1st ANOC World Beach Games in Doha, capital of Qatar, Oct. 12, 2019. (Xinhua/Nikku)