Mirjana Lučić-Baroni is a Croatian former professional tennis player. She enjoyed a meteoric rise on the WTA Tour in the late 1990s, during which she set several "youngest-ever" records. She captured the women's doubles title at the 1998 Australian Open when she was 15 years old, partnered with Martina Hingis. She also won the first ever professional tournament she entered, the 1997 Croatian Ladies Open, and defended it the following year at age 16, making her the youngest player in history to successfully defend a title. She then reached the semifinals of the 1999 Wimbledon Championships, beating world No. 4 Monica Seles, and eighth seed Nathalie Tauziat, the previous year's finalist, before she lost to Steffi Graf in three sets.

Martina Hingis is a Swiss former professional tennis player. Hingis was the first Swiss player, male or female, to have won a major title and attain the world No. 1 ranking. She spent a total of 209 weeks as the singles world No. 1 and 90 weeks as doubles world No. 1, holding both No. 1 rankings simultaneously for 29 weeks. She won five major singles titles, 13 major women's doubles titles, and seven major mixed doubles titles, for a combined total of 25 major titles. In addition, she won the season-ending WTA Finals two times in singles and three in doubles, an Olympic silver medal in doubles, and a record 17 Tier I singles titles.