Following her win at Filderstadt, Hingis defeated the reigning Australian Open champion and co-top ranked (with Steffi Graf) Monica Seles in the final in Oakland, but lost to Graf in the year-end WTA Tour Championships final in five sets. She then became the youngest Grand Slam singles winner in the 20th century by winning the Australian Open at age 16 years and 3 months (beating former champion Mary Pierce in the final).
The only Grand Slam singles title that Hingis failed to win in 1997 was the French Open, where she lost in the final to Iva Majoli.
She won the Australian Open women's doubles with Natasha Zvereva.
Davenport ended an 80-week stretch Hingis had enjoyed as the No.
1 singles player in October 1998, but Hingis finished the year by beating Davenport in the final of the WTA Tour Championships.
Coming back from injury, Hingis won the Australian Open doubles final at the start of 2002 (again teaming with Anna Kournikova) and reached a sixth straight Australian Open final in singles, again facing Capriati.
Hingis led by a set and 4–0 and had four match points but lost in three sets.
In July 2013, Hingis came out of retirement to play the tournaments of the North American hard-court season alongside Daniela Hantuchová.
During her doubles comeback, Hingis won four Grand Slam women's doubles tournaments, six Grand Slam mixed doubles tournaments, and a silver medal partnering her compatriot Timea Bacsinszky at the 2016 Summer Olympics in Rio de Janeiro.
She then reached the French Open final and was three points away from victory in the second set before losing to Steffi Graf about whom she had said before: "Steffi had some results in the past, but it's a faster, more athletic game now... Her time has passed." She broke into tears after a game in which the crowd had booed her for using underhand serves and crossing the line in a discussion about an umpire decision.