What nationality was the woman who was first-seeded and won the singles title in The 1997 Porsche Tennis Grand Prix?
1997 Porsche Tennis Grand Prix:  First-seeded Martina Hingis won the singles title, her second consecutive at the event. Martina Hingis: Martina Hingis (born 30 September 1980) is a Swiss professional tennis player, a former world No. 1 singles player and currently ranked world No. 2 in doubles by the WTA.
Swiss