The American shares a side of Kyrgios that the public doesn't always take note of.
Nick Kyrgios is 3-1 lifetime vs. US Open champion Daniil Medvedev.
The American speaks to the media after her last US Open match.
Serena Williams credits a fellow Nike superstar as a motivational force in her major return.
The 19-year-old has reached at least the third round at three straight majors.
The Russian is 1-5 against Nadal and has lost both his Grand Slam finals against him.
Victoria Azarenka extended her hand, but Marta Kostyuk wasn't willing to shake.
