Both Sushil and Amit trumped three strong grapplers one after another within a matter of just one-and-a-half-hour in the men's 74kg and 57kg freestyle events, respectively, to make the gold-medal bout, while Tomar had two easy rounds before he made the finals of the men's 125kg category.
All the final bouts will be held later in the day.
In the semifinals, Sushil beat Nigeria's Melvin Bibo to make the finals, where he will take on Qamar Abbas of Pakistan.
The 2008 Beijing Olympics bronze medallist and a silver medal winner at the 2012 London Games thrashed Australia's Jayden Lawrence 11-0 in the round of 16, before blanking Kushan Sandrage of Sri Lanka 10-0 in the last eight-stage of the competition.
Sushil, however, faced some threat in the semifinals with his Nigerian opponent managing to grab a few points. But in the end, it was the Indian who turned out to be far superior with a 8-4 victory.