Getty ImagesRichie MillsErling Haaland's 'machine-like' form for Man City proves players need proper rest, says PFA chiefErling HaalandManchester CityPremier LeagueErling Haaland's "machine-like" start to the new season proves players need a proper rest, says a Professional Footballers' Association chief.Article continues belowArticle continues belowArticle continues belowArticle continues belowHaaland on fire this season for Man CityReport says players are under more "mental stress"PFA chief says footballers need more rest