After a strong start Fulham suffered a terrible run, at one time managing just one win in 13 games, and Duff has said that the players want to "put it right".
"We got off to a great start but then had that mid-season where we struggled to pick up points, which was very disappointing," he told the club's official website. "Over the past couple of years we've usually started slow and finished strong.
"There are 12 games left, I think, so we'll be looking to put in a similar finish to what we've done in previous seasons. It has been disappointing but we're looking to put it right."
Fulham are currently 12th in the league, with 29 points from 26 games.