Dibaba won the 10,000 metres at the Summer Olympics in Beijing on 15 August. Her finish time of 29:54.66 broke the existing Olympic record of 30:17.49, which had been set by cousin Derartu Tulu at the 2000 Summer Olympics in Sydney. In addition, her finish time was the second fastest 10,000 metres of all time and an African record. The previous African record of 30:04.18 was set by Berhane Adere at the 2003 World Championships.