Mary Lou Piatek-Daniels (born August 6, 1961) is a retired tennis player from the U.S. who played on the WTA Tour during the 1980s. In 1979, she was the no. 1 junior in the world. She won her first pro title at Richmond, Virginia 1981, beating Sylvia Hanika and Sue Barker en route. She was coached by her father Joseph, a former varsity player at Indiana University, and by Trinity coach Emilie Foster. Piatek-Daniels made her ranking debut in February 1980 at no. 45. Her career wins include Robin White, Christiane Jolissaint, Kathy Horvath, Wendy White, Gigi Fernández, and Betsy Nagelsen. WTA Tour finals Singles 4 (2–2) Doubles 21 (7–14) References External links American female tennis players People from Whiting, Indiana Tennis people from Indiana 1961 births Living people Wimbledon junior champions Grand Slam (tennis) champions in girls' singles People from Munster, Indiana