The full-back needed seven stitches after a clash with team-mate Charles N'Zogbia, which forced him to be substituted as a result.
The wound is above his eye and is affecting his vision which means he is doubtful for the match against the Black Cats.
"His eye was closing on Saturday and it is still like that. He is touch and go for the weekend because of where the cut is," said Villa assistant manager Peter Grant.
"It means he has to be careful with heading. If he gets a knock it could just open up."