 The tournament has vastly expanded and, on its 100th anniversary in 1999, 130 nations competed.1913 also saw twelve national tennis associations agree at a Paris conference to form the International Lawn Tennis Federation (ILTF), which was renamed in 1977 as the current International Tennis Federation (ITF).The rules the association promulgated in 1924 have remained remarkably stable in the ensuing ninety years, the one major change being the addition of the "tie-break" system designed by James Van Alen.