Spain's Rafael Nadal won his 14th French Open championship over the weekend.It was his 22nd major tennis tournament victory of his career.The four major tennis tournaments are the Australian Open, the French Open, Wimbledon and the U.S. Open.A player wins the "grand slam" if they win all four tournaments in the same year.Nadal now has two more major wins than his rivals, Roger Federer of Switzerland and Novak Djokovic of Serbia.Nadal defeated Norway's Casper Ruud on Sunday in Paris.After his win, he said he may have to stop playing professional tennis because of foot pain.He said he had to receive pain-killing shots in his foot in order to play in the tournament.Nadal said he only accepted the pain-killing shots because the French Open is so important for him.At any other tournament, Nadal said, he would not have continued playing under such "extreme conditions."Nadal is 36 years old.He is the oldest-ever champion of the French Open, which began in 1925.