steffi graf is a professional tennis player
graf was ranked world no 1 by the women s tennis association lrb wta rrb for a record 377 total weeks  the longest period for which any player  male or female  has held the numberone ranking since the wta and the association of tennis professionals began issuing rankings
the association of tennis professionals lrb atp rrb was formed in september 1972 by donald dell  bob briner  jack kramer  and cliff drysdale to protect the interests of male professional tennis players
stefanie maria  steffi  graf lrb lsb tfi ga  f rsb  born 14 june 1969 rrb is a german former tennis player  who was ranked world no 1 during her career