27K views · 2.1K reactions | As she begins her quest for Grand Slam No. 2️⃣4️⃣, relive Serena Williams' debut Grand Slam  with her win over Martina Hingis at the 1999 US Open Tennis Championships! : United States Tennis Association - USTA (Official) | WTA | Facebook

90K views · 2.4K reactions | "I think overall I'm very proud of my career" - Martina Hingis | WTA | Facebook

47K views · 1.3K reactions |  Serena Williams, Stefanie Graf, Venus Williams, Martina Hingis & Ashleigh Barty...what a list ✖️! They've won some great Miami Open finals over the years  | WTA | Facebook

81K views · 3K reactions | It's been an amazing career for Martina Hingis, who just announced she will be retiring after the completion of the WTA Finals this week. To the 6-time #USOpen champion (in all events) we'd like to wish Martina all the best in her next chapter in life! https://www.usopen.org/en_US/players/overview/wta080301.html | US Open Tennis Championships | Facebook

30 reactions | At the 1997 Australian Open, Martina Hingis made the tennis world take note as the youngest Grand Slam champion in history. What followed was a year for the record books. Watch the latest TennisWorthy presented by Infosys   | International Tennis Hall of Fame | Facebook

The last all-teen final at the US Open was in 1999 when Serena Williams faced off against Martina Hingis. | US Open Tennis Championships