We explore the Spaniard's chances of completing the Sunshine Double, and the players with the best chance of stopping his title defense.

The "Quad Fathers" edged past Italians Jannik Sinner and Lorenzo Sonego to thrill the home crowd in their first men’s doubles match.

What makes this American's signature shot so special?

Also, Federico Coria makes some history himself by breaking into the Top 50 after reaching the Cordoba final.

Next up for the second seed is another countryman in J.J. Wolf, who found his way past Radu Albot 6-3, 7-6 (5).

Mackenzie McDonald also advanced, setting up a second-round meeting with No. 2 seed Frances Tiafoe.

Meanwhile, Novak Djokovic kicks off his 375th career week at No. 1, and is on the verge of even more history.

Also, Elena Rybakina makes her Top 10 debut, Magda Linette cracks the Top 30 and Ben Shelton soars into the Top 50.

The reigning NCAA men's champion advanced, 6-7 (5), 6-2, 6-7 (4), 7-6 (4), 6-2, on Monday to add another win to his Australian Open debut.

Tiafoe, McDonald, Korda, Brooksby, Paul, Shelton, Wolf and Mmoh have represented their country admirably—and in a variety of successful ways.