An artificial grass turf carpet comprises a ground structure having an upper surface and upstanding synthetic grass fibers attached to the ground structure, which synthetic grass fibers form a grass surface of the artificial grass turf. The carpet further has upstanding synthetic base layer fibers attached to the ground structure at positions between the upstanding synthetic grass fibers. The base layer fibers have a lower height than the grass fibers. The base layer fibers are positioned tight against one another and against neighboring grass fibers, so that a dense base layer is obtained above which the grass fibers extend. An artificial grass turf system includes such a carpet and preferably includes a thin, rubber-free infill layer on top of the base layer.