Even with the biggest shot on the court, the American struggled with the crafty Frenchman before succumbing to a shoulder injury.

Former tennis player and sports scientist Mark Kovacs has dedicated years to researching the biomechanics behind a tennis serve.

But then Gauff learned that MacMillian, a Canadian educated in America and based in South Africa, was available. And then her ...

Live-Armed and Dangerous: J.J. Wolf and one the most distinctive, explosive serves in tennis What makes this American's signature shot so special?

Former tennis player and sports scientist Mark Kovacs has dedicated years to researching the biomechanics behind a tennis serve.

Former tennis player and sports scientist Mark Kovacs has dedicated years to researching the biomechanics behind a tennis serve.

The secrets behind the world’s fastest tennis serves Mike Hewitt/Getty Images via CNN Newsource Giovanni Mpetshi Perricard produced the biggest serve in Wimbledon history this year.