Bronze medalist Sandra Perkovic of Croatia poses for photos during the medal ceremony of the women's discus throw at the 2019 IAAF World Athletics Championships in Doha, Qatar, Oct. 5, 2019. (Xinhua/Li Ming)

Silver medalist Denia Caballero of Cuba poses for photos during the medal ceremony of the women's discus throw at the 2019 IAAF World Athletics Championships in Doha, Qatar, Oct. 5, 2019. (Xinhua/Li Ming)

Gold medalist Yaime Perez (C) of Cuba, silver medalist Denia Caballero (L) of Cuba and bronze medalist Sandra Perkovic of Croatia pose for photos during the medal ceremony of the women's discus throw at the 2019 IAAF World Athletics Championships in Doha, Qatar, Oct. 5, 2019. (Xinhua/Li Ming)

Gold medalist Yamanishi Toshikazu (C) of Japan, silver medalist Authorised Neutral Athlete Vasiliy Mizinov (L) and bronze medalist Perseus Karlstrom of Sweden pose for photos during the medal ceremony of the men's 20km race walk at the 2019 IAAF World Athletics Championships in Doha, Qatar, Oct. 5, 2019. (Xinhua/Li Ming)

Bronze medalist Perseus Karlstrom of Sweden bites the medal during the medal ceremony of the men's 20km race walk at the 2019 IAAF World Athletics Championships in Doha, Qatar, Oct. 5, 2019. (Xinhua/Li Ming)

Gold medalist Yamanishi Toshikazu of Japan reacts during the medal ceremony of the men's 20km race walk at the 2019 IAAF World Athletics Championships in Doha, Qatar, Oct. 5, 2019. (Xinhua/Li Ming)

Silver medalist Authorised Neutral Athlete Vasiliy Mizinov reacts during the medal ceremony of the men's 20km race walk at the 2019 IAAF World Athletics Championships in Doha, Qatar, Oct. 5, 2019. (Xinhua/Li Ming)

Gold medalist Joe Kovacs (C) of the United States, silver medalist Ryan Crouser (L) of the United States and bronze medalist Tomas Walsh of New Zealand pose for photos during the medal ceremony of the men's shot put at the 2019 IAAF World Athletics Championships in Doha, Qatar, Oct. 5, 2019. (Xinhua/Li Ming)

Gold medalist Joe Kovacs (C) of the United States, silver medalist Ryan Crouser (L) of the United States and bronze medalist Tomas Walsh of New Zealand pose for photos during the medal ceremony of the men's shot put at the 2019 IAAF World Athletics Championships in Doha, Qatar, Oct. 5, 2019. (Xinhua/Li Ming)

Gold medalist Joe Kovacs (C) of the United States, silver medalist Ryan Crouser (L) of the United States and bronze medalist Tomas Walsh of New Zealand pose for photos during the medal ceremony of the men's shot put at the 2019 IAAF World Athletics Championships in Doha, Qatar, Oct. 5, 2019. (Xinhua/Li Ming)

Gold medalist Joe Kovacs of the United States poses for photos during the medal ceremony of the men's shot put at the 2019 IAAF World Athletics Championships in Doha, Qatar, Oct. 5, 2019. (Xinhua/Li Ming)

Bronze medalist Tomas Walsh of New Zealand poses for photos during the medal ceremony of the men's shot put at the 2019 IAAF World Athletics Championships in Doha, Qatar, Oct. 5, 2019. (Xinhua/Li Ming)

Gold medalist Yaime Perez (C) of Cuba, silver medalist Denia Caballero (L) of Cuba and bronze medalist Sandra Perkovic of Croatia pose for photos during the medal ceremony of the women's discus throw at the 2019 IAAF World Athletics Championships in Doha, Qatar, Oct. 5, 2019. (Xinhua/Li Ming)

Bronze medalist Gudaf Tsegay of Ethiopia poses for photos during the medal ceremony of the women's 1500m at the 2019 IAAF World Athletics Championships in Doha, Qatar, Oct. 5, 2019. (Xinhua/Li Ming)

Gold medalist Sifan Hassan (C) of the Netherlands, silver medalist Faith Kipyegon (L) of Kenya and bronze medalist Gudaf Tsegay of Ethiopia pose for photos during the medal ceremony of the women's 1500m at the 2019 IAAF World Athletics Championships in Doha, Qatar, Oct. 5, 2019. (Xinhua/Li Ming)

Gold medalist Mutaz Essa Barshim (L) of Qatar, silver medalist Authorised neutral athlete Mikhail Akimenko (C) and bronze medalist Ilya Ivanyuk take selfie during the medal ceremony of the men's high jump at the 2019 IAAF World Athletics Championships in Doha, Qatar, Oct. 5, 2019. (Xinhua/Li Ming)

Gold medalist Mutaz Essa Barshim of Qatar poses for photos during the medal ceremony of the men's high jump at the 2019 IAAF World Athletics Championships in Doha, Qatar, Oct. 5, 2019. (Xinhua/Li Ming)

Gold medalist Mutaz Essa Barshim (2nd R) of Qatar, silver medalist Authorised neutral athlete Mikhail Akimenko (1st L) and bronze medalist Ilya Ivanyuk (1st R) pose for photos during the medal ceremony of the men's high jump at the 2019 IAAF World Athletics Championships in Doha, Qatar, Oct. 5, 2019. (Xinhua/Li Ming)

Silver medalist Authorised neutral athlete Mikhail Akimenko poses with the medal during the medal ceremony of the men's high jump at the 2019 IAAF World Athletics Championships in Doha, Qatar, Oct. 5, 2019. (Xinhua/Li Ming)

Bronze medalist Ilya Ivanyuk poses for photos during the medal ceremony of the men's high jump at the 2019 IAAF World Athletics Championships in Doha, Qatar, Oct. 5, 2019. (Xinhua/Li Ming)

Gold medalist Sifan Hassan of the Netherlands kisses the medal during the medal ceremony of the women's 1500m at the 2019 IAAF World Athletics Championships in Doha, Qatar, Oct. 5, 2019. (Xinhua/Li Ming)

Gold medalist Sifan Hassan of the Netherlands reacts during the medal ceremony of the women's 1500m at the 2019 IAAF World Athletics Championships in Doha, Qatar, Oct. 5, 2019. (Xinhua/Li Ming)

Gold medalist Mutaz Essa Barshim (C) of Qatar waves during the medal ceremony of the men's high jump at the 2019 IAAF World Athletics Championships in Doha, Qatar, Oct. 5, 2019. (Xinhua/Li Ming)

Gold medalist Sifan Hassan (C) of the Netherlands, silver medalist Faith Kipyegon (L) of Kenya and bronze medalist Gudaf Tsegay of Ethiopia pose for photos during the medal ceremony of the women's 1500m at the 2019 IAAF World Athletics Championships in Doha, Qatar, Oct. 5, 2019. (Xinhua/Li Ming)

Gold medalist Mutaz Essa Barshim (2nd L) of Qatar, silver medalist Authorised neutral athlete Mikhail Akimenko (1st L) and bronze medalist Ilya Ivanyuk (3rd L) pose for photos during the medal ceremony of the men's high jump at the 2019 IAAF World Athletics Championships in Doha, Qatar, Oct. 5, 2019. (Xinhua/Li Ming)

Gold medalist Mutaz Essa Barshim of Qatar is seen during the medal ceremony of the men's high jump at the 2019 IAAF World Athletics Championships in Doha, Qatar, Oct. 5, 2019. (Xinhua/Li Ming)

Gold medalist Sifan Hassan (C) of the Netherlands, silver medalist Faith Kipyegon (L) of Kenya and bronze medalist Gudaf Tsegay of Ethiopia pose for photos during the medal ceremony of the women's 1500m at the 2019 IAAF World Athletics Championships in Doha, Qatar, Oct. 5, 2019. (Xinhua/Li Ming)