"Luke has got very strict guidelines on concussion markers, the first day he didn’t pass the markers so that gets shifted back," England manager Gareth Southgate said, as quoted by Tyrone Marshall on Twitter.
"We’ve got to follow the guidelines on that, we might run out of time, we’ll just see."
Shaw was called up to the national team despite suffering a head injury in the Manchester derby.
The United left-back fell awkwardly after a challenge with Rodri and had to be subbed off.
England face Albania on Friday and San Marino on Monday.
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