Shyam, who won a gold at the 2015 edition of the event, was to take on Olympic champion Hasanboy Dusmatov of Uzbekistan in the final.
However, Dusmatov pulled out of the bout owing to an injury, giving the Indian his second gold medal at the event.
Earlier, Rohit Tokas (64kg) had lost in the semi-finals to settle for bronze medal. Incidentally, Rohit had won a bronze medal in the 2015 edition as well. India thus finished the tournament with two medals.
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