Duff returned as a substitute in Sunday's disappointing 2-2 draw with Derby, his first game since he suffered a career-threatening foot injury at Portsmouth in April.
He will hope for more action at Wigan Athletic with his manager relishing the prospect of having the talented 28-year-old back at his disposal.
Allardyce said: "Damien Duff is a quality Premier League player and like a new player in the squad for me.
"It's been a long road back for him and at some point he would have been a little bit worried about how serious the injury was.
"But he has dedicated himself for a number or months now to recuperate and recover, and he is a very important player to have back."