The Madison Keys who will play two-time defending champion Aryna Sabalenka for the title at the Australian Open on Saturday night is not the same Madison Keys who was the runner-up at the U.S.

Madison Keys won her first ever grand slam title on Saturday, stunning two-time defending champion and world No. 1 Aryna Sabalenka 6-3 2-6 7-5 in a thrilling Australian Open women’s final.

Madison Keys stunned Aryna Sabalenka in the Australian Open women’s final to win her long-awaited first grand slam title while denying the World No 1 a historic ‘three-peat’. Keys halted Sabalenka’s winning run in Melbourne and triumphed in the battle of two big-hitters, winning 6-3 2-6 7-5 in a thrilling deciding set on the Rod Laver Arena.

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).

Madison Keys has beaten Aryna Sabalenka to win her first Grand Slam title.

Madison Keys played brave and accurate tennis when she needed it most, powering to a 6-3, 2-6, 7-5 victory for her first Grand Slam title.

Aryna Sabalenka will go for her third straight Australian Open title. Standing in her way is a red-hot Madison Keys. Here's everything you need to know about the final.

Madison Keys -- using a mix of solid serves, power and defense -- upset two-time defending champion and top seed Aryna Sabalenka 6-3, 2-6, 7-5 to win the Australian Open on Saturday, giving the 29-year-old American her first Grand Slam title in 46 tries.

Madison Keys will seek her first Grand Slam title when takes on two-time defending champion Aryna Sabalenka in the Australian Open final.

Madison Keys was a tennis prodigy, beating Serena Williams when she was just 14 years old, but had not won a grand slam title in her 15 year career.

Sabalenka has the chance to become the first player in 26 years to win three Australian Open women’s singles titles in a row

Madison Keys wrote three short words on the camera lens after her victory against Iga Świątek at the Australian Open: “Oh my god.”