A few days ago, fresh off their first Grand Slam doubles titles together at Wimbledon, the No.1-ranked doubles team in the world, Martina Hingis and Sania Mirza, became the first doubles team to qualify for the doubles event at the season-ending BNP Paribas WTA Finals Singapore presented by SC Global.
It will be Hingis' seventh time playing the WTA Finals - here's a look at her first six appearances.
1996: A 16-year-old Hingis qualified in both singles and doubles, falling first round in doubles with Helena Sukova but making it to the final in singles, falling in five grueling sets to Steffi Graf.
1997: After winning three of the four majors that year, Hingis was stunned in the quarterfinals of the WTA Finals by giant-killer Mary Pierce. She fell first round in doubles with Arantxa Sánchez-Vicario.
1998: Hingis fell first round in doubles with Jana Novotna, but she went all the way to the singles title, getting revenge on Pierce en route to the final then taking Lindsay Davenport out for the title.
1999: Hingis didn't let a loss to Davenport in the singles final get her down - she turned that frown upside down with her first WTA Finals doubles title alongside fellow teenager Anna Kournikova.
2000: Hingis swept both the singles and doubles titles, beating Monica Seles in the singles final and partnering Kournikova for the doubles title. She's the last player to pull off the singles-doubles sweep.
2006: A fantastic singles comeback season led Hingis to qualifying for the singles event at the WTA Finals. She didn't make it out of the round robin but did take a set off eventual champion Justine Henin.