Hussamuddin, who had outlasted South Africa's Amzolele Dyeyi 5-0 round of 32, also won his pre-quarterfinal bout by unanimous decision after a fantastic tactical display.
Amit advanced to the quarterfinals via a unanimous decision as all five judges decided in his favour. He will take on Scotland's Lennon Mulligan in the quarter-finals on August 4
This win is a huge upset as India has confirmed its first-ever medal by defeating a side that has 40 medals in the sport and is among five most successful Lawn Bowls team
In the first match of a best-of-five series, the mixed doubles pair of B Sumeeth Reddy and Ashwini Ponnappa defeated Jarred Elliott and Deidra Jordaan in straight sets with a 21-9, 21-11 scoreline.