Defending gold medalist Andy Murray of Great Britain successfully retained his title, defeating Juan Martín del Potro of Argentina in the final, 7–5, 4–6, 6–2, 7–5 to win the gold medal in Men's singles tennis at the 2016 Summer Olympics. He became the first tennis player ever, male or female, to win two Olympic singles gold medals. Murray and del Potro were only the third and fourth men to win multiple singles medals of any color. Murray's gold was Great Britain's fifth in men's singles, the most of any nation. In the bronze medal match, Japan's Kei Nishikori defeated Spain's Rafael Nadal, 6–2, 6–7(1–7), 6–3, earning Japan's first men's singles Olympic medal since 1920.

Sir Andrew Barron Murray is a British professional tennis player. He was ranked world No. 1 in singles by the Association of Tennis Professionals (ATP) for 41 weeks, and finished as the year-end No. 1 in 2016. Murray has won three Grand Slam singles titles, two at Wimbledon and one at the US Open, and has reached eleven major finals. Murray was ranked in the top 10 for all but one month from July 2008 through to October 2017, and was no lower than world No. 4 in eight of the nine year-end rankings during that span. Murray has won 46 ATP Tour singles titles, including 14 Masters 1000 events and two gold medals at the Summer Olympics.