Which stars need to shine this season: Real Madrid, Barcelona, Man Utd, PSG

Football leagues around Europe are gearing up for the new season and preseason training and friendlies are in full flow.All eyes will be on the transfer window as clubs scramble to find the missing pieces, either in the starting lineup or to complete the squad.Recommended Stories list of 4 itemslist 1 of 4Argentina and Mexico back Infantino, deepening FIFA divide: What to knowlist 2 of 4Infantino, FIFA try to move beyond botched World Cup sell-off: What we knowlist 3 of 4UEFA’s threatened legal action against Infantino and FIFA: What we knowlist 4 of 4UEFA confirms legal letter served to FIFA after Infantino’s World Cup planend of listThe mega signings of the European summer saw England international Elliot Anderson switch Nottingham Forest for Manchester City and Ivory Coast’s Yan Diomande swap RB Leipzig for Real Madrid.Rumours are rife that Rodri may be heading out of City with Barcelona poised.It seems, however, as though it has been a quieter period on the transfer front, with perhaps one of the more settled summer squads across the continent than in previous years.So, Al Jazeera Sport takes a look at which players are most crucial to their teams’ success in the leagues across...