Today, the top-seeded Greek defeated Emil Ruusuvuori 7-5, 6-1 to advance to the next round
The Greek, ranked third in the world, next faces the winner of Wednesday's match between Jannik Sinner and France's Benjamin Bonzi.
Tsitsipas admitted he had initially struggled to find his groove.
"I had an opportunity in the last game (when Ruusuvuori led 5-3) to come back. I revived from that, I regenerated some awesome tennis, and I recaptured that first set, which was crucial," he said.
"I think from that point onwards it was flawless tennis. I was able to produce some really good shots."
Auger-Aliassime, the third seed in Rotterdam, had no problem in dispatching the Italian Lorenzo Sonego 6-2, 6-3 as he hit his stride in the tournament where he beat Tsitsipas in the final last year.
Tsitsipas now holds a 13-1 record for the season, with his only defeat coming against Novak Djokovic
