NEIL Harris doesn't believe Northampton are at risk of relegation – but is warning his players they are still after the points to make them mathematically secure.
The Cobblers are six points above the drop zone and are 250/1 to go down with four games left, while Millwall know if they win their last four games they will finish in the top six.
The Lions got their promotion bid back on track by beating rivals Scunthorpe 3-1 after a four-game winless league run and following it up with a win at Shrewsbury and draw at Gillingham.
Harris is wary of any side coached by Justin Edinburgh, who led former club Gillingham to a 3-0 win at The Den last season.
"They'll be safe, they're not in danger of going down," Harris said of Friday's visitors. "But they'll certainly want a point or two or three to feel more secure as quickly as possible.
"They've got a lot of size and presence in their teams at set-pieces. What Justin's side also do is they have a right go at teams. They compete and run and Gillingham over the last couple of years were a tough team to play against.
"I expect a similar game to Scunthorpe. That was a hundred miles an hour and we had to play with calm heads.
"I expect a good crowd inside The Den now that we're back into the play-off places. It's a fanbase that wants us to stay in there and we have to do what we did in the Scunthorpe game."
Millwall travel to Fleetwood on Easter Monday when a win with a combination of other results over the weekend could see them climb above the Cod Army, who are currently third.
Harris knows it won't be easy against Uwe Roslwer's surprise packets.
He said: "Fleetwood are a big, strong physical side, good at set-plays and don't give much away. They work very hard.
"They've got some football ability in them as well and have made their ground a tough place to go.
"Both games over the Easter period are games where we'll have to stand strong and be physical and put in really good Millwall performances. Then we have to play with that quality that we've shown in spells over the last three games."
Image: Millwall FC