The League Cup winners are yet to take points off Norwich City since being promoted to the top flight.
The Dutch midfielder told the club's website: "It's going to be a difficult end of the season for us, and we have Norwich this Saturday. Norwich is a difficult team to play against. It will be a back and forth game.
"I know we haven't picked up a point from them in the Premier League yet, but this squad has the quality to score and play the football we usually.
"It has been a great season so far, but it's not over yet, we have seven games left. We have to keep the confidence up. We have the players who can play ball and we can get the results we are after."
Swansea also face Manchester United, Chelsea and Manchester City in their final games of the season.