Rio Olympics 2016: Usain Bolt wins ninth Olympic gold as Jamaica take 4x100m relay
Usain Bolt is undefeated in Olympic finals
Usain Bolt ended his Olympic career by claiming an unprecedented 'triple triple' and his ninth gold as Jamaica won the 4x100m relay final in Rio.
Bolt, 29, had won the 100m and 200m in Rio and is the only man to win all three sprint events at three Games.