Sam Edmund speaks to one of footy's most successful figures. John Cahill won 4 premierships as a player for Port Adelaide and 10 as a coach. He also coached Collingwood in the VFL for two seasons in the 1980's and was Port Adelaide Power's inaugural coach in 1997. His son Darren is a former tennis player and later coach of the likes of Andrew Agassi and Simona Halep

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