Shaw forced off in Manchester derby
Manchester United defender Luke Shaw was withdrawn in the second half of Saturday's 2-0 defeat to City in the derby.
The left-back was hurt after an awkward landing when challenging Rodri in the air and required treatment on the pitch.
Although he was able to resume, he then needed to go ground again and was replaced by Alex Telles with 17 minutes remaining.
The defender has been named in the England squad for the upcoming World Cup qualifiers against Albania next Friday and San Marino (Monday 15 November).
However, whether he will link up with Gareth Southgate's side will depend on an assessment of the problem and a check on the concussion, that led to United making four substitutions.
Shaw's head injury was managed in accordance with FA guidelines and he was removed from the field of play as soon as a concussion was suspected.
Luke will now be monitored by club medical staff, following The FA return to play protocol, and England will be kept updated on progress.