Darya Mikhaylova

Darya Mikhaylova

Ukrainian athletic runner Darya Mikhaylova attends a news conference prior to the Birell Prague Grand Prix 2019, in Prague, Czech Republic, on September 6, 2019. (CTK Photo/Michal Krumphanzl)

Vit Pavlista

Vit Pavlista

Czech athletic runner Vit Pavlista attends a news conference prior to the Birell Prague Grand Prix 2019, in Prague, Czech Republic, on September 6, 2019. (CTK Photo/Michal Krumphanzl)

Arne Gabius

Arne Gabius

German athletic runner Arne Gabius attends a news conference prior to the Birell Prague Grand Prix 2019, in Prague, Czech Republic, on September 6, 2019. (CTK Photo/Michal Krumphanzl)

Geoffrey Koech

Geoffrey Koech

Kenyan athletic runner Geoffrey Koech attends a news conference prior to the Birell Prague Grand Prix 2019, in Prague, Czech Republic, on September 6, 2019. (CTK Photo/Michal Krumphanzl)

Darya Mikhaylova

Darya Mikhaylova

Ukrainian athletic runner Darya Mikhaylova attends a news conference prior to the Birell Prague Grand Prix 2019, in Prague, Czech Republic, on September 6, 2019. (CTK Photo/Michal Krumphanzl)

Arne Gabius

Arne Gabius

German athletic runner Arne Gabius attends a news conference prior to the Birell Prague Grand Prix 2019, in Prague, Czech Republic, on September 6, 2019. (CTK Photo/Michal Krumphanzl)

Vit Pavlista

Vit Pavlista

Czech athletic runner Vit Pavlista attends a news conference prior to the Birell Prague Grand Prix 2019, in Prague, Czech Republic, on September 6, 2019. (CTK Photo/Michal Krumphanzl)

Fancy Chemutai

Fancy Chemutai

Kenyan athletic runner Fancy Chemutai attends a news conference prior to the Birell Prague Grand Prix 2019, in Prague, Czech Republic, on September 6, 2019. (CTK Photo/Michal Krumphanzl)

Arne Gabius, Vit Pavlista, Fancy Chemutai, Darya Mikhaylova, Geoffrey Koech

Arne Gabius, Vit Pavlista, Fancy Chemutai, Darya Mikhaylova, Geoffrey Koech

Athletic runners (from left) Arne Gabius, Vit Pavlista, Fancy Chemutai, Darya Mikhaylova and Geoffrey Koech attend a news conference prior to the Birell Prague Grand Prix 2019, in Prague, Czech Republic, on September 6, 2019. (CTK Photo/Michal Krumphanzl)

Fancy Chemutai

Fancy Chemutai

Kenyan athletic runner Fancy Chemutai attends a news conference prior to the Birell Prague Grand Prix 2019, in Prague, Czech Republic, on September 6, 2019. (CTK Photo/Michal Krumphanzl)

Geoffrey Koech

Geoffrey Koech

Kenyan athletic runner Geoffrey Koech attends a news conference prior to the Birell Prague Grand Prix 2019, in Prague, Czech Republic, on September 6, 2019. (CTK Photo/Michal Krumphanzl)