United States' Serena Williams celebrates after defeating Romania's Simona Halep in their fourth round match at the Australian Open tennis championships in Melbourne, Australia, on Jan. 21, 2019. Kin Cheung/AP Photo
MELBOURNE, Australia—As Serena Williams made her way out to the Australian Open’s main court during pre-match introductions, the voice booming over the stadium’s speakers implored spectators to welcome “the world’s No. 1 player—from Romania, Simona Halep.”
