Kenya's Kipchoge dominates, defends Olympic marathon title

Eliud Kipchoge, of Kenya, celebrates after winning the gold medal in the men's marathon at the 2020 Summer Olympics, Sunday, Aug. 8, 2021, in Sapporo, Japan. (AP Photo/Shuji Kajiyama)

Eliud Kipchoge, of Kenya, celebrates after winning the gold medal in the men's marathon at the 2020 Summer Olympics, Sunday, Aug. 8, 2021, in Sapporo, Japan. (AP Photo/Shuji Kajiyama)

Gold medalist Eliud Kipchoge, of Kenya, center, stands with silver medalist Abdi Nageeye, of Netherlands, left, and bronze medalist Bashir Abdi, of Belgium, during the flower ceremony for men's marathon at the 2020 Summer Olympics, Sunday, Aug. 8, 2021, in Sapporo, Japan. (AP Photo/Eugene Hoshiko)

Gold medalist Eliud Kipchoge, of Kenya, center, stands with silver medalist Abdi Nageeye, of Netherlands, left, and bronze medalist Bashir Abdi, of Belgium, during the flower ceremony for men's marathon at the 2020 Summer Olympics, Sunday, Aug. 8, 2021, in Sapporo, Japan. (AP Photo/Eugene Hoshiko)

Abdi Nageeye, of Netherlands, celebrates after winning the silver medal in the men's marathon at the 2020 Summer Olympics, Sunday, Aug. 8, 2021, in Sapporo, Japan. (AP Photo/Shuji Kajiyama)

Gold medalist Eliud Kipchoge, of Kenya, center, stands with silver medalist Abdi Nageeye, of Netherlands, left, and bronze medalist Bashir Abdi, of Belgium, during the flower ceremony for men's marathon at the 2020 Summer Olympics, Sunday, Aug. 8, 2021, in Sapporo, Japan. (AP Photo/Shuji Kajiyama)

Eliud Kipchoge, center, of Kenya, leads during the men's marathon at the 2020 Summer Olympics, Sunday, Aug. 8, 2021, in Sapporo, Japan.(AP Photo/Shuji Kajiyama)

Runners compete during the men's marathon at the 2020 Summer Olympics, Sunday, Aug. 8, 2021, in Sapporo, Japan. (AP Photo/Eugene Hoshiko)

Abdi Nageeye, of Netherlands, celebrates after winning the silver medal in the men's marathon at the 2020 Summer Olympics, Sunday, Aug. 8, 2021, in Sapporo, Japan. (AP Photo/Eugene Hoshiko)

Eliud Kipchoge, of Kenya, grabs a water bottle during the men's marathon at the 2020 Summer Olympics, Sunday, Aug. 8, 2021, in Sapporo, Japan.(AP Photo/Shuji Kajiyama)

Competitors run past the water station during the men's marathon at the 2020 Summer Olympics, Sunday, Aug. 8, 2021, in Sapporo, Japan. (AP Photo/Shuji Kajiyama)