Paula Badosa reached the US Open quarter-finals for the first time on Sunday by conquering Wang Yafan as well as New York's suffocating humidity.

The 26th-seeded Spaniard came through 6-1, 6-2 for her best Grand Slam result since she considered quitting the sport due to a serious back injury.

Despite the one-sided scoreline, the first two games on Sunday took 17 minutes to complete while Badosa saved all eight break points she faced.

"It was so humid I thought I was going to die," said the 26-year-old New York-born player of the humidity which hit 85% at noon.

"I knew she was tough but I'm tougher."

Badosa is the first Spanish woman to make the quarter-finals since Carla Suarez Navarro in 2018 while it has been 28 years since a Spaniard last reached semi-finals.

That honour fell to Conchita Martinez in 1996.

Badosa will take on either defending champion Coco Gauff or Emma Navarro for a place in the semi-finals.