The full list of competing athletes in Doha is: 
Men - Heptathlon 
Trey Hardee (USA) 
Leonel Suarez (CUB) 
Aleksandr Pogorelov (RUS) 
Aleksei Drozdov (RUS) 
Olexiy Kasyanov (UKR) 
Andrei Krauchanka (BLR) 
Bryan Clay (USA) 
Roman Šebrle (CZE) 
Women - Pentathlon 
Jessica ENNIS (GBR) 
Natalia DOBRYNSKA (UKR) 
Aiga GRABYSTE (LAT) 
Tatyana Chernova (RUS) 
Hyleas Fountain (USA) 
Karolina TYMINSKA (POL) 
Marina GONCHAROVA (RUS) 
Antoinette NANA-DJIMOU (FRA)