Keyes defeated number two seed Iga Swiatek in a tie-break in the third set
Madison Keys will face Aryna Sabalenka in a Grand Slam final for the first time this weekend.
The American defeated number two seed Iga Swiatek in a tie-break in the third set.
Sabalenka can become the first woman to win three consecutive Australian Open titles since Martina Hingis in 1999.
The final takes place in Melbourne this Saturday.

Jude Gallagher Reaches Lightweight Quarter Finals At The European Elite Championship
Harvey Vale And Jamie McGrath Out Of ROI Nations League Games Due To Injuries
Monday Morning Sports Update
Ireland Surrender 19-Point Lead In WXV Rugby Opener Against USA
Arsenal's Perfect Premier League Start Ended By Brighton
Séamus Power Six Shots Back Ahead Of Biltmore Championship Final Round
McIlroy Two Shots Back Heading Into BMW PGA Championship Final Round
Sunday Morning Sports Update