Mira Potkonen of Finland impressed in her opening bout here at the International Boxing Association (AIBA) Women's World Championships.
Potkonen has a World Championship bronze medal from 2016 and topped the podium at the European Games in Minsk in June.
Seeded first in the lightweight division, she is benefitting from the absence of a number of her previous rivals here.
Olympic Games gold medallist Estelle Mossely of France recently turned professional, while reigning world champion, Kellie Harrington of Ireland, is injured.
Potkonen dominated in her first bout of the competition, delivering a knockout blow to Sandra Brugger of Switzerland to win the contest.
Up next is set to be Marie Palacios of Ecuador, who just got past Amina Zidani of France 3-2.
Stepping into Harrington's shoes is her compatriot Amy Broadhurst, a bronze medallist at this year's European Championships in Alcobendas.
🥊 RESULT 🥊— IABA (@IABABOXING) October 6, 2019
A perfect end to the weekend for Team Ireland as @amybroadhurst12 secures a unanimous win vs 🇩🇪 and books her place in the next round!
She will return to the ring in Last 16 action on Wednesday
WELL DONE AMY! 🇮🇪🥊#TeamIreland #RoadToTokyo #20x20 #CantSeeCantBe pic.twitter.com/DHZjpzHeXe
The Irishwoman was deemed to be a unanimous winner against Maya Kleinhans of Germany.
Her victory has set up a bout with Poland's Aneta Rygielska, who defeated Ala Yarshevich by the same result.
Third seed Sema Çalışkan of Turkey was then stunned by Monkhor Namuun of Mongolia, losing 4-1.
Namuun, who benefitted from substantial levels of support here, now faces Uzbekistan's Raykhona Kodirova, a 5-0 conqueror of Lithuania's Ana Starovoitova.
Wang Cong unanimously beat Agnes Alexiusson to draw Wu Shih-yi of Chinese Taipei, who narrowly overcame Irène Fiolek of Canada 3-2.
Competition is due to continue tomorrow with the light flyweight and light welterweight divisions.