"Nathan Hughes sits down and he sweats, He literally has to change his T-shirt, but there are ways of helping. Maybe give him six extra T-shirts.
"In Tokyo at that time of the year that sort of temperature is regular - and that will make a hell of a difference to the games.
"It becomes a different game. It becomes like playing a game in a thunderstorm because the ball becomes that slippery - everything becomes slippery - and you've also mentally got to get over it."