The U.S. Open's Labor 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.

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.

"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."

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