Derby County have reacted to being six points from 17th place by appointing freshly departed Aston Villa manager John Gregory to replace Colin Todd.
Todd took over the manager's hotseat from Jim Smith earlier in the campaign.
It is often said that the worst time to face a team is when they have just installed a new manager - every player is eager to impress the boss, past form counts for little and there is usually a positive reaction.
Les has been around the block a few times and knows what the team can expect on Saturday.
"I know, because the team always seems to put on a bit of a performance for the new manager," said Les on the fact that this is possibly not the best time to be travelling to Pride Park.
"You think 'why didn't they play like that before?' when it's the same batch of players."
However, Les's thoughts rightly centre on our own priorities which, presently, is picking up league points.
"We're losing a bit of ground with the teams above us at the moment and it's important that we get back to winning ways.
"We've got to get back to playing the way we have been playing and getting the results on the end of it. The performance against Chelsea is a point we can look at and take great heart from and say this is what we know we can achieve and need to week in week out."
Our 14-goal so far striker acknowledges that point collecting has not been prolific of late.
"That's the thing, we've all got a bit carried away with the cup competition. We're in the final and that's great, but we've got to start picking up the points in the league again."
Get ready for the BIG Day
Les Ferdinand is well aware that a new manager in place can have a galvanising effect on a struggling team.