We conduct numerical experiments on polymeric droplets hitting a at solid surface, inrealistic circumstances. The results present time-resolved non-Newtonian stresses actingin the droplet, which so far have not been measured experimentally. Comparing withthe simulation of the impact of a Newtonian droplet, the eects of viscoelasticity ondroplet behaviors such as splashing, the maximum spreading diameter and deformationare analyzed. With detailed information on the contact region, we demonstrate how thecontact line behaves according to the transition of uid from elasticity dominated toshear-thinning dominated when a droplet expands and contracts on the substrate. Thework is inspired by several experiments on similar cases and we discuss whether and howthe elasticity in an impinging droplet takes eect.