Dheeraj triumphed 3-0 over the his opponent and set up a tough second-round clash against top-seeded Mexican Lindolfo Delgao Garza, who got a bye in the opening round.
In the draw unveiled today, Asian Games gold-medallist Vikas Krishan (75kg) and Commonwealth Games silver-winner L Devendro Singh (49kg) were the only Indians to be seeded.
While Devendro was given the fourth seeding, Vikas was seeded second and both of them got first-round byes in their respective categories. They will open their campaigns on June 20 against yet-to-be decided rivals.
In the 52kg category, Gaurav Bidhuri will fight it out against American Antonio Vargas in his opening contest tomorrow. Also in action tomorrow will be former Commonwealth Games gold-medallist Manoj Kumar (64kg), who will take on Puerto Rico's Danielito Zorrila de la Rosa.
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In the light heavyweight (81kg) division, Sumit Sangwan will be up against Trinidad's Andrew Fermin.
In the 91kg division, Amritpreet Singh will face Armend Xhoxhaj of Kos (Greek Islands), while Satish Kumar (+91kg) will square off against Tonga's Manase Kaho Raikadroka.
India have not sent any entry in the 56kg category as Shiva Thapa qualified for the Rio Games during the Asian qualifiers in March.