Chelsea interim manager Rafael Benitez's detailed dossier on Wigan Athletic complied in preparation for last weekend's match has been leaked to the press.
The Blues ran out comfortable 4-1 winners over Wigan on Saturday and following that victory a full report containing a detailed look at Roberto Martinez's side has been acquired by the Daily Mail.
The document was given to Chelsea first-team players and coaches profiling the strengths and weaknesses of all Wigan players complete with a plan of attack for the match.
In the report Latics defender Steven Caldwell is described as "very slow when turning" and Chelsea forwards are advised to run at the centre-back.
Paul Scharner is said to be "uncertain" while Jean Beausejour is targeted as a player who is "very weak on his right foot" and vulnerable to poor passes from wide areas.
Benitez's opposition analyst Xavi Valero is believed to responsible for preparing a similar document on every team the Blues face this season.