Fulham see Spurs boss Redknapp as key to bringing down Richards
The Craven Cottage club are seeking to take legal action against Richards after missing out on Peter Crouch last year.
They believe Redknapp's comments back their claim that Spurs were out of the running for Crouch until Richards got involved.
Just four days before Crouch moved to White Hart Lane, Redknapp said: "I like Crouchie a lot but I don't think it will be possible for us to do it.
"Sunderland and Fulham are also interested. I spoke to the chairman and he felt it looked too expensive."
Fulham allege Richards phoned Crouch and urged him to move to Spurs.
Premier League chief executive Richard Scudamore has claimed the chairman intervened at the request of Pompey.
That contradicts comments from former Pompey chief executive Peter Storrie, who implied at the time that he knew nothing of Richards' involvement.
Now Fulham want to know who at Pompey requested Richards' involvement in the deal.
They say Richards should not be involved in transfers. Their petition to the Companies' Court claims they have been unfairly prejudiced by Richards and the Premier League.