The American star is the world record holder in the event and justified his status as the pre-race favourite.

Romanchuk clocked a Championship record 1min 32.81sec to take the gold, adding to the marathon world title he earned earlier this year.

He was followed by Switzerland’s multiple Paralympic and World Championship medallist Marcel Hug, who clocked 1:32.89 for second place.

China’s Yong Zhang completed the podium in 1:33.05.

While Romanchuk is expected to dominate wheelchair race events in the future, one of the sport’s most experienced competitors added to their medal haul.

Tunisia’s Walid Ktila clinched the 13th World Championships gold medal of his career by clocking a time of 50.54 in the men’s T34 400m final.

Home favourite Mohamed Alhammadi settled for second in 51.11, with 52.84 enough for China’s Yang Wang to finish third.

In the field events New Zealand’s Lisa Adams triumphed in the women’s F37 shot put competition.

Adams, sister of two-time Olympic shot put champion Valerie, broke the world record with a distance of 14.70m.

"I have been training maybe for year and a half and this is my international debut,” said Adams.

"I feel relieved and also really happy.

"There is more confidence after this event.”

China’s Na Mi took silver with 12.95m while Irina Vertinskaya of Russia earned bronze with a best effort of 11.78m.

The Championships continue tomorrow.