She stopped Sunisa Dangchaiyapoom of hosts Thailand in the first round of their under-51 kilograms bout with a superbly executed elbow at Central World Convention Hall.

Other highlights were Laura Burgos from Mexico, who cemented herself as a major challenger with a great performance to beat Chinese Taipei's Yun Lin in the women's under-54kg.

Belouarrat Oumaima of Morocco is another to watch after she took all three rounds in the women's under-48kg against Sweden's Sofia Holmer.

United States enjoyed a clean sweep of five victories from five in the early going with Tierra Brandt edging an excellent fight for the Americans in the women's under-60kg against Estonia's Astrid Johanna Grents.

Brandt took the contest on a very close points decision.

In the women's under-71kg, Russian-born Ekaterina Bezhan, competing as a neutral, locked horns with Sweden's Angela Mamic in a battle between two fighters who have won many medals.

Bezhan edged a bout worthy of being a final with a close decision.

An interesting result in men's action went the way of New Zealand's Travis Schwitzer in the men's under-23 71kg after a scorecard draw.

The judges went for the New Zealander over Sajjad Jebur of Iraq after taking a closer look at the bout.

Daren Rolland of France was in good form as he stopped Ahmed Alshammar of the United Arab Emirates in round one of their men's under-57kg contest.

Greece's Andreas Zacharakis stopped Yedoh Meledje Jean François of Ivory Coast with an early elbow at under-86kg. 

The World Championships are due to continue until Saturday (May 12).