The 2026 ATP Tour is the premier men's tennis circuit organized by the ATP, featuring Grand Slams, the ATP Finals, Masters 1000, ATP 500, ATP 250, and the United Cup. It also includes the Davis Cup, Next Gen ATP Finals, and Laver Cup, although these events do not award ranking points. A season of notable achievements, the calendar tracks title wins, including key doubles defenses such as John Peers at the Australian Open and Andrea Vavassori at the French Open. The year was defined by a wave of retirement announcements from veteran players: David Goffin (announced in March), Roberto Bautista Agut (April), Egor Gerasimov (May), Tomislav Brkić (June), and Dan Evans (June). Bautista Agut, a former World No. 9 with 12 singles titles, played his final match at the Copa del Rey in July, while Evans made his last appearance at Wimbledon.