Katie Boulter defeated Danielle Collins 6-4 6-0 in the US Open qualifying round of 128 on hard.
Boulter K. took it in straight sets.
Katie Boulter beat Danielle Collins 6-4 6-0. Umpiry, "Katie Boulter vs Danielle Collins — US Open Qualifying Round of 128", https://umpiry.com/match/2017-08-23/boulter-vs-collins-us-open-q128?utm_source=cite (as of 23 August 2017).