Having twice won bronze at the Asian Championships, Borgohain got over one of the toughest challengers in her category.

She was up against another medal favourite from the off, defeating 2016 world champion Valentina Khalzova of Kazakhstan by a 3-2 split decision.

India were successful in other categories too, with world bronze medallist Parveen Hooda winning by unanimous decision in the women's under-63kg tournament against Panpatchara Somnijek from Thailand.

Ankhushita Boro won unanimously in the women's under-66kg against Japan's Tsubata Arisa, as did Preeti in the women's under-57kg tournament against Sitora Turdibekova of Uzbekistan.

Minakshi won by a 4-1 split decision too in the women's under-52kg against Irish Magno of the Philippines.

World bronze medallist Karina Ibragimova from Kazakhstan progressed too with a unanimous victory over Im Aeji from South Korea in the women's under-57kg category.

Her compatriot Zhaina Shekerbekova was a convincing winner over Narita Hana in the women's under-54kg tournament and Zhazira Urakbayeva won by a 4-1 split decision against Kim Chae-won of South Korea in the women's under-52kg.

Thailand's Jutamas Jitpong, who won a world silver in Istanbul this year, progressed in the same weight class as Shekerbekova with a 4-1 split decision win over Nigina Uktamova of Uzbekistan.

In the only men's weight class today, world champions Saken Bibossinov of Kazakhstan and Tomoya Tsuboi from Japan advanced to the next round.

Both won world titles in Belgrade last year, with Tsuboi dropping a category.

Bibossinov defeated Qaiyum Ariffin of Malaysia unanimously, with Tsuboi winning by a 5-0 verdict over Po-Wei Tu of Chinese Taipei.