New Delhi: Vikas Krishan and Shiva Thapa are among the four Indian boxers who qualified for the World Championships and assured themselves of medals by advancing to the Asian Boxing Championships semifinals in Tashkent today.

Sumit Sangwan and Amit Phangal were the other two Indian boxers to book medals as well as World Championship slots in the prestigious continental event.

Shiva beat Chinese Taipei's Chu-En Lai in his quarterfinal bout. The Indian, who is also a World Championships bronze-medallist, will face top seed Chinzorig Baatarsukh in his semifinal clash on Friday.

Vikas beat Indonesia's Brama Hendra Betaubun. He will now face fourth seed Dongyun Lee of Korea in the semifinals.

Sumit, the former Asian Olympic Qualifiers' gold-medallist, gave India their first win of the day in 91 kg category when he stunned third-seeded Chinese Fengkai Yu 4-1. Sumit will now face second seed Jakhon Qurbonov of Tajikistan in the semifinals on Friday.

Amit Phangal defeated fourth seed Cornelis Kwangu Langu of Indonesia 4-1 in 49kg category.

Amit is up for a tough one in the semifinals, where he will square off against Uzbekistan's Olympic gold-medallist Hasanboy Dusmatov.

However, it was heartbreak for Gaurav Bidhuri who lost to second-seeded Chinese Jiawei Zhang in 56kg category.