The Scotland international was clearly hurt when being forced off the pitch in front of the Stretford End, in the move that involved a strong penalty shout when Antony had a shot handled inside the box.
Scott swiftly signalled to come off and the substitute was replaced by Mason Mount for the final few minutes of the disappointing 1-1 draw.
In his interview with MUTV's Liam Bradford, the boss said: "We have to assess this, to set the diagnosis.
"I don't know in this moment to return [against Crystal Palace next month], I think it's a little bit too quick turnaround.