In this week’s Sport: exploring the dark side of Man City manager Pep Guardiola | David Weir says one more Paralympic gold medal will be enough for him, and explains why para-athletics is a ruthless business | Swimmer Ellie Simmonds on why she might have to break a world record to win gold in Rio | Long jumper Stef Reid opens up about a dramatic road to Rio and what we mean by fairness in sport | Twenty years of change at Arsenal, as remembered by Arsene Wenger | Osi Umenyiora tackles the key questions ahead of the new NFL season | NBA star Luol Deng on Brixton pride and lifts | Plus: David Flatman on why exotic imports threaten to hamper British rugby talent