In the 2020 Tokyo Olympics, Lam Siu Hang participated in the men's singles event and defeated Puerto Rico's player Brian Afanador 4:3 in the first round, followed by a 4:3 victory over India's player Sathiyan Gnanasekaran in the second round. In the third round, he lost 1:4 to Japan's player Harimoto Tomokazu and ended up in the top 32.