What was the first Grand Slam tournament won by René Lacoste?

René Lacoste’s first Grand Slam tournament victory was the French Open, then known as the French Championships, in 1925.

Lacoste defeated fellow Frenchman Jean Borotra in the singles final, winning 7–5, 6–1, 6–4. The victory marked the start of a remarkable major-tournament career during the golden era of French tennis.

He won the French Championships again in 1927 and 1929, for three titles there in total. His seven Grand Slam singles titles also included Wimbledon victories in 1925 and 1928, plus U.S. Championships wins in 1926 and 1927.

The terminology can cause confusion: the event was officially called the French Championships during Lacoste’s career and only later became widely known as the French Open. Either name refers to the same major tournament. Lacoste was one of France’s “Four Musketeers,” whose success helped make French tennis dominant in the late 1920s.