An experimental test rig suitable for examining lubrication under relatively high loads has also been developed, and sample results have been reported for a compliant rubber ball sliding against a steel disc. In the EHL regime, the values of the friction coefficient predicted by the theory show some discrepancy with respect to the experimental ones, particularly at lower loads. At the same time, the dependence on the entrainment speed and on the load shows a good agreement. The observed discrepancy is probably due to complexity of the mechanical behaviour of the examined rubber, which exhibits viscoelastic effects, and these effects cannot be captured by a simple hyperelastic model adopted in the simulation.