The hosts were held to a goalless draw at Signal Iduna Park, while Bayern Munich clinched the domestic title with a win over Hertha Berlin.
"I think Schalke can be very happy with this point. We gave them hardly any chances and had loads ourselves," the Polish international said after the game.
"We actually played exactly how we wanted to but we're disappointed with just a draw."
Dortmund currently occupy second position in the Bundesliga table on 52 points.