USA set new world record in mixed 4x400m relay in Doha.

The USA broke their own record on Sunday as they stormed to victory in the first-ever mixed-gender 4x400m relay event at 2019 World Athletics Championships in Doha.

The American team featuring Wil London, Allyson Felix, Courtney Okolo and Michael Cherry finished in a time of 3:09:34, beating their previous world record by three seconds.

Jamaica finished in second, as they a set a national record of 3:11:78, while Bahrain set a continental record taking bronze with a time of 3:11:82.

Ten months after giving birth, Felix was vital in the USA’s triumph. Running the second leg, she managed to hold a two-metre gap over Jamaica’s Roneisha McGregor as she ran a time of 50.4 seconds.

Poland was the only team to divert from the man-woman-woman-man formation as they went for men in the first two legs and women in the last two.

Their gamble failed to pay off as their 30-metre lead from the second leg was destroyed in the final 100 metre as Justyna Swiety-Ersetic was overtaken four other nations as Poland finished in fifth behind Great Britain.

Felix surpassed Usain Bolt’s record of 11 world titles as she became the all-time gold medal winner.