This work was supported by the Portuguese Foundation for Science and Technology (FCT) and European Social Fund (ESF), through a Post Doctoral grant endorsed to R.M.
We thank Raphael Reiners (head of data collection, PERFORM, Opta Sports) for support with the data acquisition, Fritz Francisco and Michael Smith for commenting on our manuscript, and Tamás Vicsek and David Sumpter for valuable discussion. This work was supported by the Portuguese Foundation for Science and Technology (FCT) and European Social Fund (ESF), through a Post Doctoral grant endorsed to R.M. (SFRH/BPD/89806/2012), under the Human Potential Operating Program (POPH); and through the