With women’s tennis on the verge of an epic showdown between its top two players with the Australian Open title on the line, Keys, the 29-year-old American, crashed the party. She stormed back against Iga Swiatek to win their semifinal 5-7, 6-1, 7-6 (10-8).

Aryna Sabalenka hopes to do something no woman has in more than a quarter of a century: win a third consecutive Australian Open championship.