Beware IRAN!
I remember back in 1978 they managed to draw with one of the teams hotly tipped (by themselves!) to win the tournament
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Indeed, what could have been! Its the first tournament I remember (I was 8), so I was right behind Scotland, given England's failure to qualify.
Scotland were up against it after losing to Peru, but the draw with Iran was a massive low, followed by one of their greatest performances (alas in vain) vs the Dutch and that Gemmill goal.
Odd factoid alert - Brazil came 3rd in the tournament despite never losing a game!
Odd factoid 2 - France played Hungary wearing an Argentine club side strip, as both teams turned up with just white "change" strips.
Conspiracy alert - A lot of thing went in favour of the Argentinians to allow them to win. Pushing back their match against Peru and ? bribing them to lose most notably!