Germany's Alexander Zverev defeated Karen Khachanov of the Russian Olympic Committee in the final, 6–3, 6–1, to win the gold medal in Men's Singles tennis at the 2020 Summer Olympics. It was both countries' first medals at the event since 2000, and Germany's first victory. In the bronze medal match, Spain's Pablo Carreño Busta defeated Serbia's Novak Djokovic, 6–4, 6–7^(6–8), 6–3. En route to his bronze medal, Carreño Busta defeated the world's top two ranked players – the ROC's Daniil Medvedev and Djokovic.

64 players from 31 nations competed.

Andy Murray was the two-time reigning gold medalist, but withdrew before his first-round match due to a quadriceps strain.

World No. 1-ranked Djokovic was attempting to win the fourth of five components of a potential Golden Slam (and the third man to do so across an entire career, after Andre Agassi and Rafael Nadal), having already won the Australian Open, French Open and Wimbledon Championships that year, but he lost to Zverev in the semifinals.

The medals for the competition were presented by Nenad Lalović, IOC Executive Board Member; Serbia; and the medalists' bouquets were presented by David Haggerty, ITF President; United States.

2020. aasta Tokyos toimunud suveolümpiamängude meeste tenniseturniir oli 2020. aasta suveolümpiamängude tenniseprogrammi ürituseks, mis toimus 24. juulist kuni 1. augustini. See oli 16. kord, kui tennis oli olümpiamängude ametlik spordiala. Võistlus peeti Tokyos asuvas Ariake tennisekeskuses.