![Martina Hingis of Switzerland hits the ball during the match against Serena Williams of the USA for the US Open at the USTA National Tennis Center… | Martina hingis Martina Hingis of Switzerland hits the ball during the match against Serena Williams of the USA for the US Open at the USTA National Tennis Center… | Martina hingis](https://i.pinimg.com/736x/80/c0/7c/80c07cb3b769ba8e8ae9efdef9dd135b.jpg)
Martina Hingis of Switzerland hits the ball during the match against Serena Williams of the USA for the US Open at the USTA National Tennis Center… | Martina hingis
USA Serena Williams in action vs Switzerland Martina Hingis during... Foto di attualità - Getty Images
![11 Sep 1999: Serena Williams of the USA is congratulated by Martina Hingis of Switzerland after their US Open final (Clive Brunskill/Allsport) | Tennismash 11 Sep 1999: Serena Williams of the USA is congratulated by Martina Hingis of Switzerland after their US Open final (Clive Brunskill/Allsport) | Tennismash](https://tennismash.com/wp-content/uploads/2019/08/Serena-Williams-Martina-Hingis-US-Open-1999.jpg)
11 Sep 1999: Serena Williams of the USA is congratulated by Martina Hingis of Switzerland after their US Open final (Clive Brunskill/Allsport) | Tennismash
![Martina Hingis of Switzerland returns a shot to Serena Williams of USA during the semifinals of the US Open at USTA Na… | Martina hingis, Sportmädchen, Tennis stars Martina Hingis of Switzerland returns a shot to Serena Williams of USA during the semifinals of the US Open at USTA Na… | Martina hingis, Sportmädchen, Tennis stars](https://i.pinimg.com/736x/4b/e5/fe/4be5fe054e9a6012cc2b2544822ddb05.jpg)
Martina Hingis of Switzerland returns a shot to Serena Williams of USA during the semifinals of the US Open at USTA Na… | Martina hingis, Sportmädchen, Tennis stars
![Martina Hingis of Switzerland returns a shot to Serena Williams of USA during the semifinals of the US Open at USTA National Tennis Center in Flus… | Martina hingis Martina Hingis of Switzerland returns a shot to Serena Williams of USA during the semifinals of the US Open at USTA National Tennis Center in Flus… | Martina hingis](https://i.pinimg.com/736x/ee/78/f5/ee78f532b96a3e2e474a5b99fcd62c84.jpg)
Martina Hingis of Switzerland returns a shot to Serena Williams of USA during the semifinals of the US Open at USTA National Tennis Center in Flus… | Martina hingis
![Serena Williams of the United States hugs her father and coach Richard Williams after her U.S. Open win over [Martina Hingis of Switzerland] in Flushing Meadows September 11. Williams defeated [Hingis] 6-3 Serena Williams of the United States hugs her father and coach Richard Williams after her U.S. Open win over [Martina Hingis of Switzerland] in Flushing Meadows September 11. Williams defeated [Hingis] 6-3](https://c8.alamy.com/comp/2D5G09N/serena-williams-of-the-united-states-hugs-her-father-and-coach-richard-williams-after-her-us-open-win-over-martina-hingis-of-switzerland-in-flushing-meadows-september-11-williams-defeated-hingis-6-3-7-6-digital-image-2D5G09N.jpg)
Serena Williams of the United States hugs her father and coach Richard Williams after her U.S. Open win over [Martina Hingis of Switzerland] in Flushing Meadows September 11. Williams defeated [Hingis] 6-3
![Serena Williams of the United States returns to Martina Hingis of Switzerland during the U.S. Open women's final in Flushing Meadows September 11. Williams is the seventh seed in the tournament. PJ/SV Serena Williams of the United States returns to Martina Hingis of Switzerland during the U.S. Open women's final in Flushing Meadows September 11. Williams is the seventh seed in the tournament. PJ/SV](https://c8.alamy.com/comp/2D5AD7K/serena-williams-of-the-united-states-returns-to-martina-hingis-of-switzerland-during-the-us-open-womens-final-in-flushing-meadows-september-11-williams-is-the-seventh-seed-in-the-tournament-pjsv-2D5AD7K.jpg)