Roman Abramovich took over the ownership of Chelsea football club in the year 2003, the billionaire changes a lot in the history of the club.

His investment brought the club to one of the title contenders and his hunger for success has lead to the sacked of many managers since he took over.

The above photo is the list of managers that has work for Chelsea football club since Roman Abramovich took over the ownership right.

The list also contains the number of games each manager played and their winning percentage before been sack or left the club.

London mogul Frank Khalid thinks the most underrated manager is Avram Grant but it happens to be the one with the highest winning rate percent for the game played.

If fans are to go by this record on the list Avram Grant will be the greatest manager for the Blue because his winning record tops other managers on the list.

Did you think this alone can grant him Chelsea's greatest manager above others?

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Content created and supplied by: AbbasOlarewaju88 (via Opera News )