Madison keys into semis of the us open 2017

The No. 15 seed became the final piece of an all-American puzzle on Wednesday night at the USTA Billie Jean King National Tennis Center, joining three other Americans in the US Open semifinals. The Californian strolled confidently past Kaia Kanepi of Estonia, 6-3, 6-3.

Keys blasted eight aces in crushing Kanepi.

Four Americans in the semifinals is "pretty awesome," said Keys.