Keys, the No. 19 seed and a two-time semifinalist at Melbourne Park, had won the first set. But Rybakina, who like Keys is a precise winner machine when she is playing the tennis she wants to play, had taken the second by seizing the initiative and playing on her front foot. Halfway to the finish, Keys had become a passive counterpuncher.

Hope for an All-American semifinal was dashed after five-time Grand Slam winner Iga Swiatek beat Emma Navarro on Wednesday.

American Madison Keys rallied to beat Elina Svitolina in the Australian Open quarterfinals. What to know about the match and what's next for Keys.