The pair qualified this week - four spots remain open for the prestigious season-ending event.
The Spanish Armada sails to top of the world.
Casper Ruud wanted another shot at Rafa Nadal. Now, he'll get five in South America.
San Diego Open set for October 8-16th at the Barnes Tennis Center.
The pair had to be separated by the umpire, and the bad blood lingers.
The world No.1 is getting worldwide acclaim, and deservedly so.
The Seoul native won a doubles match in his home city.
