The French Open, also known as Roland-Garros, is an annual tennis tournament held over two weeks in May and June. Established in 1891 and played since 1928 on outdoor red clay courts at the Stade Roland Garros in Paris, France, the French Open is (since 1925) one of the four Grand Slam tournaments played each year, the other three being the Australian Open, Wimbledon and the US Open.
https://en.wikipedia.org/wiki/List_of_French_Open_Men's_Singles_champions