Vinesh put up an impressive show, while Narsingh was lucky to have reached the bronze medal play-off despite losing in the qualification round.
On her way to the final, Vinesh comfortably beat Tatyana Amanzhol-Bakatyuk of Kazakhstan in the semifinals after getting the better of Mongolia's Tsogtbaatar Byambazaya in quarterfinals 8-0.
Narsingh, who has been included in 74kg category in the absence of double-Olympic medallist Sushil Kumar, lost to Daisuke Shimada of Japan 9-12 in the qualification round but could make it to repachage as his Japanese opponent reached the final.
In Men's 70kg category, Parveen Rana missed out on a third-place finish as he went down fighting to Takafumi Kojima of Japan in the bronze medal play-off.
Rana had earlier lost to Uzbekistan's Bekzod Abdurakhmonov 8-13 by Fall in the semifinals.
En-route to the semis, however, Rana did well to beat Tat Du Can of Vietnam 12-2 in his quarterfinal bout after clearing the qualification round against Sri Lanka's Shanaka Madushanka Ranwalage by fall, 2-0.
In Men's 61kg category, Sonu was defeated by Masakazu Kamoi of Japan 5-1 in the qualification round itself, while Japan's Takeshi Yamaguchi defeated Khatri Mausam 10-6 in the quarterfinals of 97kg category.
Mausam got the better of CUI Xiaocheng of China 8-0 in the qualification round earlier.
