Minutes removed from making the 2019 Australian Open semifinals, Stefanos Tsitsipas, 6-foot-4 and handsome as a lion, was talking about YouTube. With a microphone in his face and all the attention that comes with taking out Roger Federer two days earlier, Tsitsipas spoke his truth. “I was watching a lot of creators, people that were creating nice content on YouTube,” the 20-year-old said, moments after becoming the youngest man to advance to a major semifinal in 12 years. Advertisement “I found this platform unique,” he added, proud fists on hips. Then, with the tennis world hanging on his every word, he offered them these seven gems: “Guys, if you haven’t subscribed, please subscribe.” Athlete-as-brand is nothing new. But this wasn’t the typical case of a jock clumsily shoehorning his favorite mass-produced light beer into postgame remarks, trying to maximize the down-home folksiness of his image. This was all organic. Here was a rising champion, the bright path to glory laid out for all to see, asking us to join him in his true passion: posting content online. Every day, Tsitsipas plays tennis. Every few days, he treats his sizable following to a nugget from the mind of Stefanos. Sometimes it’s…