It was a day of all kinds of firsts for Bianca Andreescu, who won her first US Open, became the first-ever Grand Slam singles winner from Canada and was the first major champion born in the 2000s. And she did it the hard way, defeating Serena Williams, 6-3, 7-5, in an electrically excited Arthur Ashe Stadium.
All of this was, obviously, a big deal, and social media reacted accordingly. Andreescu was congratulated by her fellow players ...