“Every World Cup needs them, those ‘dark horse”’nations who perform well in qualifying, enjoy some success in their respective continental tournaments and then threaten to upset the heavyweights. The term itself comes from 1830s horse-racing gambling — for an unknown horse for whom it was hard to assign betting odds. In the two centuries since, it’s been slightly corrupted as a footballing term. We have surprise packages, who emerge during the tournament, and that’s what dark horse should mean based on its etymology. …”
NYT/ATH (Video)