Three types of surfaces are used in Grand Slams Tennis - Grass, Clay and Concrete(hard).
14 Grand slam men's singles titles
Margaret Court, she won 24 Grand Slams in her life.
Jelena Ostapenko is the youngest women to win a grand slam at the 2017 French Open.
Lindsay Davenport is a former number one professional tennis player. She has an Olympic gold medal in tennis singles and holds three Grand Slam singles tournament titles.