Hydration boos and surprise results - World Cup talking points

The first week of the World Cup has seen several notable moments, including a focus on hydration as players struggle with the heat. Surprise results have also been a hallmark of the tournament so far, with underdog teams pulling off unexpected victories. BBC Sport is analyzing these developments, highlighting the key talking points from the initial matches. Players' health and well-being remain a concern due to the extreme temperatures and humidity levels at the tournament.

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