Advani maintained a clean slate in the group stage with an all-win record.
Having overcome the toughest challenge from Chinese heavyweight Ding Junhui, the Indian continued his fine form to topple established players of the UK-based snooker circuit.
The Indian defeated Welshman Dominic Dale, England's Robert Milkins, Ryan Thomerson from Australia and local talent Phaitoon Phonbun.
On qualifying to the Last 32 knockout stage, Advani whitewashed Germany's Lukas Kleckers 6-0. He now faces Yuan Sijun of China for a berth in the quarterfinal.
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Out Of those, two world titles came in back-to-back IBSF 6 red championships.
(REOPENS SPD 10)
Advani said in the first game, where Mehta put up a solid show, was the turning point.
"The way Aditya (Mehta) started, I never thought I would win the first frame. I think winning the first frame gave me the confidence to go ahead for a victory," he said about winning the first game where Mehta led 56-23.
"I thought that whatever chances I get, I will get to score. I tried to play well today. I think I exceeded my own expectations and performed exceptionally well today.