Experimental results are presented concerning the impact of a 20 mm steel ball incident obliquely on a smooth granite surface. The angle of incidence and the spin of the ball were varied to examine the effects on the rebound velocity and spin. If the ball is incident with topspin, there is only a small change in the horizontal speed of the ball, in which case the effective coefficient of friction between the ball and the surface is relatively small. If the ball is incident without spin or with backspin there is a large reduction in the horizontal speed of the ball. The results can be described by a simple model where the coefficient of friction remains constant if the ball slides throughout the impact or where the tangential coefficient of restitution remains constant if the ball grips the surface. Crown Copyright (C) 2019 Published by Elsevier B.V. All rights reserved.