WTA Auckland: Tauson upsets top seed Keys to reach semi-final
Tauson will play American Robin Montgomery in the last four

Dane Clara Tauson, the No 5 seed, reached the semi-finals of the Auckland Open by winning against American Madison Keys, the top seed, 6-4, 7-6 (7) on Saturday.
Tauson, ranked No 50, will play Robin Montgomery next at the ASB Tennis Arena.
The 22-year-old Dane beat Italian qualifier Lucrezia Stefanini (6-2, 6-3) and American Sofia Kenin (4-6, 7-6 (7), 7-6 (3)) ahead of her win today.
In the previous rounds of the tournament, Keys, ranked No 21, won against Italian Lucia Bronzetti (6-4, 6-4) and Romanian Jaqueline Cristian (6-1, 6-2).
Auckland WTA 250, other quarter-final matches (ASB Tennis Arena, hard, USD 275,094):
- Naomi Osaka (7) beat Hailey Baptiste: 6-7 (2), 6-1, 6-2
- Robin Montgomery beat Bernarda Pera: 6-4, 6-4
- Katie Volynets vs. Alycia Parks