Mihailo Vasic (9), of Serbia, shoots under pressure from Ira Brown, of Japan, during a men’s 3-on-3 basketball game at the 2020 Summer Olympics on July 26 in Tokyo. (AP Photo) Serbia notched a thumping victory over host nation Japan on Monday to remain undefeated in the Olympic men’s 3x3 basketball tournament. The top-seeded Serbian squad, led by Dusan Domovic Bulut, improved to 5-0 in the round-robin stage of the sport’s Olympic debut. Japan slid to 1-4 after several narrow losses in the tournament, now in its third day at the Aomi Urban Sports Park in Tokyo. "We’re missing opportunities. We’re not competing like we know how," said Japan’s Ira Brown, who was held to just one point in his team’s 11-21 loss.