The soon to be 15-year-old shot a final round of 3-over 75 on a windy day but still managed to finish the tournament at 2-under 286, four clear of his nearest rivals -� Manav Das and Samarth Dwivedi.
"I dedicate this victory to my mom and dad who have been a pillar of strength to me," said Piyush, after being crowned the champion.
Manav and Samarth shot an identical 4-over 76 to finish the tournament at 290. Syed Saqib Ahmed, who had rallied brilliantly yesterday, gave up the chase on the 12th hole after a hat-trick of bogeys to be content with a fourth-place finish at 291.
Ainesh Ahluwalia shot the best round of the day with a 2-under par 70 to finish ninth at 296. Shakti Singh occupied the last spot in the top-10 with a total of 297.
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Piyush made a steady start before making his first mistake of the day on the par-3 fifth when he ended up with a bogey. Another bogey on the finishing hole of his forward journey put him at 2-over for the round.
"I am happy to win the Northern India Amateur which is considered to be very prestigious and has a rich tradition," said the champion who registered his first amateur win in only his second appearance on the senior Tour.
"The victory has boosted my morale and I look forward to finishing on top of the merit list this year," said Piyush who has already established himself as No.1 in his category on the IGU Junior Tour.