"I am very emotional now. I congratulate Caster Semenya. I would like to beat her. Everything is possible
"I am very, very happy. This medal is for all Burundians and they are happy now. Everybody is watching in Burundi. I am the best runner of Burundi. I am so excited. In this final, everybody was looking good, all competitors are strong. So I got off there as fast as possible to make it a fast race.
"I am very emotional now. I congratulate Caster Semenya. I would like to beat her. Everything is possible."
Ajee Wilson of the USA claimed the bronze medal and said: "I think the key was the timing. We did not do too many races during the season, so the timing was really important towards the world championships. I did not expect the podium, I was ready to fight, attack the top three and see what happens.
"Against this strong field, I tried to focus on my own race. I tried to speed it up in the last 100 metres, no matter if I came out short of a medal. I did my best, pushed it 100 per cent.
"I feel super-happy, the crowd was super-awesome and super-special tonight. The crowds were electrifying, loud and so supportive.
"I am not sure about my next schedule yet, I just look forward to going home tomorrow. For this, I have to thank God, my coach, my teammates and all the people who were uplifting and supported me on this way."
"We have had very good champions in the event over the years so it is a proud moment for me to win this title for my country.
"I knew I was in pretty good form and thought I could make the podium but to win this gold is wonderful."
His teammate Timothy Cheruiyot won silver and said: “"I am happy we [Kenyan athletes] prepared well for this. Me and Elijah [Manangoi] train together and he is my friend, so I am happy for him to win gold and for me to win silver.
"I was happy when the noise came from the crowd. I tried to respond to that."
Norway’s Filip Ingerbrigsten claimed the bronze medal.