Two-time Grand Slam champion Angelique Kerber thrashed Madison Keys in just 53 minutes to reach the Australian Open semi-finals.
The German was in brilliant form as she beat American Keys 6-1 6-2 on Rod Laver Arena.
Keys, a 2017 US Open finalist, struggled badly throughout, winning only 18 of 46 points on her own serve
Kerber, the 2016 champion in Melbourne, will play world number one Simona Halep or Karolina Pliskova in the last four.