Tennis players to have represented multiple countries

Novak Djokovic is a Serbian professional tennis player. Djokovic has been ranked as the world No. 1 in men's singles by the Association of Tennis Professionals (ATP) for a record 428 weeks, finished as the year-end No. 1 a record eight times, and has been ranked No. 1 at least once in a year for a record 13 different years. He has won 101 ATP Tour–level singles titles, including a record 24 majors, a record 40 Masters, a record seven year-end championships, and an Olympic gold medal. Djokovic is the only man in tennis history to be the reigning champion of all four majors at once across three different surfaces. In singles, he is the only man to achieve a triple Career Grand Slam, and the only player to complete a Career Golden Masters, a feat he has accomplished twice. Djokovic is the only player in singles to have won all of the Big Titles over the course of his career.

Czech-American tennis player

Serbian tennis player

Yugoslav and American tennis player

Elena Andreyevna Rybakina is a Russian-born Kazakhstani professional tennis player. She is currently ranked world No. 2 in women's singles by the Women's Tennis Association (WTA). Rybakina has won 13 WTA Tour-level singles titles, including two majors at the 2022 Wimbledon Championships and the 2026 Australian Open, as well as the 2025 WTA Finals and two WTA 1000 events. Rybakina is the first Kazakhstani player to win a major and to be ranked inside the world's top 10.

Australian tennis player (born 1993 in Croatia)

Russian-Australian tennis player

Russian-Australian tennis player

British tennis player (born 1995)

Russian/Australian female tennis player