Dyer’s is described as a knock, which isn’t serious but he is struggling for Saturday’s trip to Highbury.
Robert though has a suspected broken cheekbone and will have an x-ray today. If the scan reveals a fracture then he will miss several weeks.
Sir Bobby said: "Laurent could have a fractured cheekbone, and if that is the case he will be out of the trip to Arsenal on Saturday.
"He said he was OK to take his penalty in the shoot-out but it didn't look that way to me.
"We'll have to wait and see what happens but I'm not hopeful."
The only upside of this is that Hugo Viana may get the extended run in the team that he deserves.
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