The Serbian tennis player is the first man since 1948 to save championship points in the final and go on to win.
The 5-year-old royal also has another connection to Serena Williams.
The two tennis greats competed in the United States vs. Switzerland mixed doubles match at the Hopman cup.
The tennis legends will play a mixed doubles match on New Year's Day at the Hopman Cup in Australia.
The show of emotion triggered a standing ovation in the terraces.
"Would you describe your game as a silky gazelle?"
The duchess wasn't sparing with her smooches. 😘 😘 😘
Roger Federer's stunning performance in the Australian Open final was, above all, an awesome display of mental toughness and determination in the face of huge psychological pressure.
The 35-year-old capped his triumphant return from knee surgery with a record-extending 18th major title after a vintage battle with his Spanish rival, who had won all three of their previous meetings at Melbourne Park.
At the end of the second round of The Open, Phil Mickelson at age 46 and Henrik Stenson at age 40 led the tournament. This