Australian Kelsey-Lee Barber has won the women's javelin at the athletics world championships in Doha

The spear-chucker's moved from fourth to first with a final-round throw of 66.56 metres.

American Noah Lyles has taken out the 200 metres in 19.83 seconds while compatriot Sam Kendricks has cleared 5.97 metres to secure the pole vault crown in a countback from Swede Armand Duplantis .

The United States also triumphed in the 800 metres with Donavan Brazier clocking one minute 42.34 seconds.