No. 1 Barty upset by Muchova in Aussie quarters

No. 1 Barty upset by Muchova in Aussie quarters

Top-ranked Ash Barty was upset by No. 25-seeded Karolina Muchova in the quarterfinals of the Australian Open on Wednesday, ending her bid to become the first Australian woman to win the title in Melbourne since Chris O’Neil in 1978.