Who did Hingis beat in Australian Open finals?

Question

Martina Hingis played three different opponents on her way to three Australian Open titles between 1997 and 1999. Her first championship at Melbourne Park was claimed against Mary Pierce; in 1998 Hingis defeated Spain’s Conchita Martinez in the final; and in 1999 she claimed her third and final Australian Open title against France’s Amelie Mauresmo.