On a day when the third and fourth seeds were felled in three sets, No. 1 seed Jannik Sinner got past French wild card Gael Monfils 6-3, 3-6, 6-3 to reach the quarterfinals of the ABN AMRO Open Thursday in Rotterdam, Netherlands.

Monfils saved three of five break points and finished with a 21-13 edge in winners, including a 6-3 edge in aces. But Sinner was in control on both his first serve (winning 37 of 49 points, 75.5 percent) and his second serve (17 of 23, 73.9 percent).