Relive the moment football's formbook was flipped upside down as Ian Porterfield fired minnows Sunderland into a shock lead against the mighty Leeds United.
Porterfield scored in the 31st minute of the 1973 FA Cup final taking advantage of some slack Leeds defending at a corner to fire a right-footed shot into the roof of the net.
His winning goal inspired the Black Cats to what remains one of the biggest upsets in the 136-year-old competition.
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Ian Porterfield dies - leave your tribute.-
Quinn's tribute to legend Porterfield.-
Cats Legends remember Cup hero.-
Fans pay tribute to Porterfield.-
Widow's touching message.