(CNN) After stunning the world at Wimbledon, Cori "Coco" Gauff reached her third career main draw at the weekend by dominating qualifying at the Citi Open in Washington.

The 15-year-old American Gauff needed just 64 minutes to win her final qualifier, cruising past Japanese opponent Hiroko Kuwata 6-1 6-2 to confirm her place in one of the main warm-up tournaments for the US Open.

Previous to this success, Gauff had only qualified for the Wimbledon and Miami Open main draws.

"I was glad that I was able to get a feel of how it is, the site, playing those two qualifying matches," Gauff said after her final qualifying match.

"The weather is similar to home, so I felt like I've been practicing at home. I'll be happy playing on any court."