At the 2008 Summer Olympics in Beijing, Ohuruogu won her heat against Yulia Guschina who finished 0.18 seconds behind. She won the semi-final over Shericka Williams by 0.14 seconds. In the final, she became the first ever British female Olympic 400m champion, by beating the pre-race favourite Sanya Richards (bronze) and Shericka Williams (silver), with a time of 49.62s, the fastest time of 2008. In doing so, Ohuruogu won the 50th gold medal for Great Britain in athletics at the Summer Olympics. She was once again ranked No. 2 in the world over 400m behind Sanya Richards. Ohuruogu was also part of the bronze medal winning team in the 4x400 m relay, initially finishing 5th but being upgraded to 3rd place following subsequent disqualifications for drugs offences of the teams finishing in 3rd and 4th place.