Mean transverse sphericity versus $p_{\rm T}^{\rm max}$ for MC simulationsat $\sqrt{s}=7$ TeV. Results are shown for PHOJET and PYTHIA6 (tunes ATLAS-CSC, PERUGIA-0 and PERUGIA-2011) simulations. The events are required to have more than 2 primary charged particles in $|\eta|\leq0.8$ and transverse momentum above $0.5$ GeV/$c$.