ABC Australia Wildcard Preston makes maiden quarters with upset win
The 20-year-old world number 204, who also has a wildcard at the upcoming Australian Open, won the match against the world number 72 6-4, 6-1.
The 20-year-old world number 204, who also has a wildcard at the upcoming Australian Open, won the match against the world number 72 6-4, 6-1.