 In May 1975 she won the singles title at the West German Championships in Hamburg after a close three-set final against Kazuko Sawamatsu.In 1976, Tomanová reached the singles final at both the French Open and the Australian Open.She lost at the French Open to Sue Barker 6–2, 0–6, 6–2 and at the Australian Open to Evonne Goolagong Cawley 6–2, 6–2.