KENNY Jackett says Millwall cannot afford to dwell on the euphoria of reaching the FA Cup quarter-finals with a league clash against Peterborough just around the corner.
The Lions welcome the Championship's bottom side to The Den on Tuesday evening on the back of their fifth round success against Luton Town that set up a last-eight tie with Blackburn Rovers.
But Jackett has demanded that his players put the FA Cup to the back of their minds as they look to compete on both fronts this season after slipping nine points adrift of the play-off places.
He told the club's official site: "There is no doubt in my mind that this is a key game in our season. A positive scoreline is vital to turn around out league results, which have been poor of late.
"We have worked very hard to get ourselves into a good position in the league and then dropped off the pace in recent weeks.
"The Blackburn match is one to look forward to, but we've got four important League games before that which could have a big bearing on our season.
"Our priority is to rediscover our form in the Championship and take that into the cup tie."