Arsenal's 2003-04 squad that went the entire Premier League season unbeaten: 26 wins, 12 draws, 0 defeats. The only team to achieve this in the Premier League era. Henry, Vieira, Bergkamp, Pires, Cole. It hasn't been done since and given the intensity of modern football, it might never be done again. Preston North End did it in 1888-89 but Arsenal fans would rather you didn't mention that.