"Most Decembers we play between eight and nine games at the worst time of the year. The pitches are heavier, the weather is worse and then in the second half of the season you'll find a lot of players at all clubs carrying strains, pulls, but because of the importance of the games, they keep on playing," he said.
"And then when they get to the end of the season and have a major tournament like a World Cup or European Championship they are not 100% fit. They can't be. They need that rest factor which brings the energy back into the system. Germany always takes that month-long break in January and they always seem to do better in World Cups than anyone ever expects." Sir Alex may be on to something.