1. Physical and technical performance of elite youth soccer players during international tournaments: influence of playing position and team success and opponent quality. Issue 1 (2nd January 2017) Authors: Varley, Matthew C.; Gregson, Warren; McMillan, Kenneth; Bonanno, Daniele; Stafford, Kimberley; Modonutti, Mattia; Di Salvo, Valter Journal: Science and medicine in football Issue: Volume 1:Issue 1(2017) Page Start: 18 Record Type: Journal Article View Content: Available online (eLD content is only available in our Reading Rooms) ↗