MILLWALL will assess Shaun Williams today after the midfielder left the pitch injured in the 1-1 draw with Blackpool at Bloomfield Road on Tuesday night.
Williams went down in the centre circle a few minutes into the second half with Neil Harris sending on Ben Thompson in his place.
The Lions had largely been in control of the game up to that point but Williams' withdrawal, on top of the unavailability of Jimmy Abdou and Ed Upson, meant Harris was left with an inexperienced midfield pairing of Thompson and George Saville to see the game out against Neil McDonald's side.
Millwall were within eight minutes of securing a third win in a row after Mark Beevers had given them a first-half lead before a scuffed Brad Potts effort fell to David Norris in the box and he was taken down by last man Carlos Edwards.
Blackpool striker Jack Redshaw duly dispatched the spot-kick to the top corner, and Harris felt the injury to Williams had a significant effect on Millwall's ability to maintain their control of the contest.
But the Millwall boss had no complaints at the award of the penalty or Edwards' sending off and he will now hope Williams does not join the long-term casualty list.
Harris said: "We'll have to see how he is (today). It's a back spasm by the looks of it, but we'll have to see how that unfolds. Hopefully with some treatment and some rest we might get him back for Saturday.
"It changed the rhythm of the game, it gave them a boost and we didn't adapt. We lost a little bit of control of the game, but we still didn't look in any danger of losing a goal.
"I'm disappointed. I couldn't see where we were going to concede a goal from. We looked solid, we looked composed, but we weren't at our best in the second half, that's for sure.
"But we never looked in any danger either. We looked like we'd more than comfortably see the game out and the red card and the penalty completely changed the momentum of it."