|Around the Academy:
It's been the word on everybody's lips during Euro 2004.
Holland have used it, England have tried to play this way, but just what is the diamond formation?
It's effectively a 4-4-2, but with midfielders having specific roles within their usual jobs.
One of the two central midfielders will be expected to get forward as often as possible and support the strikers.
While the other midfielder will play more deeply, providing extra protection to the defence.
In England's case, Frank Lampard has played the more defensive holding role.
And Paul Scholes has been the more attacking supporting Wayne Rooney and Michael Owen.