The 18-year-old phenom improved to 32-3 win-loss for the season (20-1 on clay) and will next tackle third-seeded Alexander Zverev for a spot in the semi-finals.
Earlier in the day, Zverev was pushed to his limits before overcoming Spanish qualifier Bernabe Zapata Miralles 7-6(11), 7-5, 6-3 to reach a fourth Roland-Garros quarter-final in five years.
Rafa battles past Felix
Rafael Nadal's quest for a record-extending 14th Roland-Garros crown is still alive as the Spaniard squeezed past No.9 seed Felix Auger-Aliassime 3-6, 6-3, 6-2, 3-6, 6-3 in the fourth round on Sunday.
The fifth-seeded Nadal, facing Auger-Aliassime for the first time since his uncle and former coach Toni Nadal joined the Canadian's coaching staff last year, landed just 50% of his first serves in, and converted just one of seven break points in the opening set.
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Nadal served significantly better in the second instalment, posting a 74% first-serve percentage and saving the two break points he faced.
With the clash entering a fifth set, Nadal had converted just five out of 19 break points opportunities so far. But a crucial break of serve in the decider sealed the win for the popular Mallorcan.
The win earned Nadal a spot in the quarter-finals and a 59th career meeting with long-time rival Novak Djokovic.