Extreme temperatures do not simply affect performance – they can pose a serious risk to a player's health

England had to deal with a weather delay in their round of 16 clash with Mexico at the Estadio Azteca - now they could be in for more issues thanks to mother nature when they meet…

English and Norwegian players will face off under extreme and dangerous levels of heat stress, scientists say, thanks to a Wet Bulb Index over over 90°F.