It was four Americans for four semifinal spots at the 2017 US Open – for the first time in 36 years.

Coco Vandeweghe and Madison Keys ensured that on Day 10 of this year’s Open, with Vandeweghe upsetting No. 1 seed Karolina Pliskova and Madison Keys topping qualifier Kaia Kanepi. With that, the two friends advanced to play each other in one semifinal, with Day 9 winners Venus Williams and Sloane Stephens having already secured their spots in the other semi.

It was an undeniable achievement for Team USA. The last time four American women reached the penultimate stage at the year’s final Grand Slam was 1981, with Tracy Austin, Chris Evert, Martina Navratilova and Barbara Potter all advancing and Austin topping Navratilova for the title.

And the last time four American women advanced to the semifinals of any Grand Slam came at Wimbledon in 1985. That year, Chris Evert, Zina Garrison, Martina Navratilova and Kathy Rinaldi all advanced to the semi stage, with co-No. 1 seeds Navratilova and Evert playing in a three-set final won by the lefty.

play video Keys vs. Kanepi