Huddersfield currently sit 15th in the Premier League table, just three points clear of the dropzone having won only two of their last 11 league fixtures.
The West Yorkshire side were comfortably beaten 2-0 by Tottenham Hotspur at Wembley on Saturday, but their next four matches all come against teams currently sitting within four points of them in the standings.
"The Tottenham game was perhaps more of a free game, but now the next four games will define our season," Ince is quoted as saying by The Mirror.
"But I think with the way we're playing, the way we're sticking together and the belief we have in the dressing room, we can control what we do.
"I think there were a lot of positives from our second-half performance against Tottenham, which we can take forward. Now it's about settling down and getting focused for Saturday, which is a massive game."
Huddersfield face five of the bottom 10 in their final nine Premier League fixtures this season.