UPDATE 1-Athletics-Brazier destroys the field to clinch first 800 metres title for U.S.

Donavan Brazier stormed home and broke the world championship record to claim a first-ever world title for the United States in the men's 800 metres on Tuesday. The 22-year-old, running in his first world or Olympic final, destroyed the field as he raced past Puerto Rican Wesley Vazquez with 300 metres left to win in one minute 42.34 seconds.

Bosnia's Amel Tuka, who won the bronze in Beijing in 2015, went one better by taking the silver and Kenya's Ferguson Cheruiyot Rotich got the bronze. Brazier's win came less than 24 hours after Alberto Salazar, the head coach at the Nike Oregon Project (NOP) where he trains, was banned for four years by the U.S. Anti-Doping Agency for "orchestrating and facilitating prohibited doping conduct".

Salazar has denied wrongdoing and vowed to appeal and sportswear giant Nike has said it will stand by the 61-year-old coach. "I've said all season that my goal was to get the gold here and to break this record, and that's what I did," said Brazier. "It means the world to me. To be world champion at 22 years old, I can't believe it."

The race was left wide open after Botswana's Nijel Amos, one of the favourites, withdrew before his opening heat on Saturday with an Achilles injury and titleholder Pierre-Ambroise Bosse was eliminated in the semi-finals. Vazquez quickly took the initiative and led at the bell with Brazier tucked in behind and Tuka in third.

There was never any doubt above the outcome when Brazier made his move down the back straight while Vazquez was also overhauled by Tuka and Rotich on the final bend.