Upper: average transverse momentum as a function of $p_{\rm T}^{\rm trig}$ in the toward (left) and away (right) regions measured in pp and p-Pb collisions at $\sqrt{s_{\rm NN}}=5.02$ TeV. Results for data and comparison with models PYTHIA 8 (green) and EPOS LHC (red) predictions are shown. Bottom: average transverse momentum measured in pp collisions divided by that measured in p-Pb collisions. A similar ratio is shown for model predictions.