sentences:  Jimmy Connors is the only individual to have won US Open singles titles on three surfaces (grass, clay, and hard), while Chris Evert is the only woman to win US Open singles titles on two surfaces (clay and hard).The US Open is the only Grand Slam tournament that has been played every year since its inception.During the 2006 US Open, the complex was renamed to "USTA Billie Jean King National Tennis Center" in honor of Billie Jean King, a four-time US Open singles champion and women's tennis pioneer.