Chris Wilder has hinted at making changes for Tuesday trip to face Brentford in the capital.
Speaking ahead of departing south, Wilder reaffirmed his opinion that Saturday's efforts at Rotherham were well below-par, despite taking a share of the spoils.
Wilder revealed: "Johnson, Stearman, Lundstram, Washington are all pushing, I've got some big decisions to make and whoever is selected then so be it.
"We had a pretty frank assessment stood out in the cold at about 9.45am on Sunday morning and that didn't bother me.
"I'm the biggest supporter of these players, but quite frankly that performance on Saturday wasn't good enough and not what I expect from my team."
On a possible recall for Paul Coutts, the manager added: "We're trying to see where Paul's best position is in our system. Is he best as the bottom of a three, in a two or as a three, we played a three at Forest and it didn't work out really.
"Is Paul a direct rival for Flecky and Ollie, possibly so, or we might try a three again, with Paul playing deeper, which suits his game more.
"What I've said to the players is that nobody is bulletproof and that's right the way through. We've got good players ready to step in."