Novak Djoković defeated Hugo Dellien 6–2, 6–2 at the Tokyo Olympics on hard court in the first round. The Serbian world number one dominated the Bolivian qualifier from the outset, claiming both sets with identical scorelines to advance smoothly through the early stage. Dellien, ranked 84th, offered minimal resistance against Djoković's superior court control and consistency. The victory marked a straightforward entry into the tournament for the top seed, who was targeting gold in Tokyo.