Carlos Alcaraz and Novak Djokovic motored into the quarter-finals of the US Open on Sunday as reigning women's champion Aryna Sabalenka kept her title defence firmly on track.

Spanish second seed Alcaraz and tennis icon Djokovic -- who are on course to meet in the semi-finals -- both recorded straight-sets wins on the Arthur Ashe Stadium main court.

Five-time Grand Slam champion Alcaraz overpowered France's Arthur Rinderknech 7-6 (7/3), 6-3, 6-4 and has not dropped a set to date at the championships.

"I think my style of tennis suits pretty well the energy here in New York," the 22-year-old said.

"The energy is special playing the day session, playing the night session. It doesn't matter, people are always there. I love it and I think that's why I play my best tennis here," he added.

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