The Brit finished in the second automatic qualifying spot with a time of 49.49s after starting off slowly but managed to push to the front after the first bend.
Result: Jack Green through to 400m hurdles semis
© PA Photos
Great Britain's Jack Green is through to 400m hurdles semi-finals in his first Olympic Games.
You May Like
Recomended from Sports Mole
Follow @SportsMole for the latest breaking news stories, and follow @sm_headlines to get every headline from Sports Mole