Abstract: A tubular monofilament fiber with predefined weak points for an artificial turf system is disclosed. The fiber comprises a tube comprising a perimeter wall enclosing a hollow interior area of the tube, and a plurality of predefined weak points formed in the perimeter wall that divide the perimeter wall into a plurality of fibrils and connect adjacent fibrils. The predefined weak points are easily breakable to disconnect the plurality of fibrils from each other by mechanical means for brushing the fiber, by conventional brushing processes using in installing an artificial turf, or by footsteps of players. The hollow interior area, the perimeter wall, and the plurality weak points extend from a top end of the fiber to a bottom end of the fiber.