Don Budge won the 1938 French Championships men’s singles title while completing a Grand Slam season.
Budge defeated Roderich Menzel in the final, 6–3, 6–2, 6–4, on the clay courts at Stade Roland-Garros. The tournament was then called the French Championships; the modern name French Open became standard after the event’s transition into the Open Era.
The Paris victory was the second leg of Budge’s 1938 calendar-year Grand Slam. He had already won the Australian Championships and then added Wimbledon before completing the sweep at the U.S. National Championships. That made him the first player in tennis history to win all four major singles tournaments in one calendar year.
This achievement is sometimes confused with a career Grand Slam, which means winning each major at least once across a career. Budge did that too, but his 1938 feat was more specific: all four titles arrived in the same season. He won the French final without dropping a set.