The U.S. Open's Labour Day Monday morning session belonged to the underdogs, as Naomi Osaka and Felix Auger-Aliassime delivered commanding performances that carried them back to Grand Slam quarter-finals after years in the wilderness, Reuters reported.

Osaka looked every bit the four-time major champion while dismantling third seed Coco Gauff 6-3 6-2 in just 64 minutes, reaching her first Flushing Meadows quarter-final in five years with a display that mixed power with poise at Arthur Ashe Stadium.

"I'm a little sensitive. I don't want to cry. I had so much fun out here," said Osaka, whose smile never left her face during the dominant victory, according to Reuters.

"A big thank you to my team. We've been through a lot, it hasn't been easy but they have been by my side."