Iga Swiatek locks in Keys semi-final, Shelton shines

Iga Swiatek booked her second Australian Open semi-final with another stunning display on Wednesday, while Americans reached the last four of the men's and women's singles at Melbourne Park for the first time in 16 years.

- Agencies

MELBOURNE:

Polish world number two Swiatek crushed eighth seed Emma Navarro 6-1 6-2 at Rod Laver Arena and will battle another American in Madison Keys, who overhauled Elina Svitolina 3-6 6-3 6-4 in the earlier quarter-final.

Ben Shelton wore down Italian Lorenzo Sonego 6-4 7-5 4-6 7-6(4) in a highlight-laden clash at the end of the day session to reach his first semi-final at the year's first Grand Slam.

Shelton, who will meet the winner of Jannik Sinner and Alex De Minaur for a place in the final, ensured the United States has players in the men's and women's semis for the first time since Andy Roddick and Serena Williams in 2009.

Searching for her first Grand Slam title, Keys will be hard-pressed to go further than Swiatek, who has crushed all five of her opponents at this tournament and is the only woman in the semis to avoid dropping a set.

A throbbing ball of energy from the first point to the last, the five-times Grand Slam champion broke Navarro to love in the first game and was not prepared to concede a point -- even when good sportsmanship might have warranted it.