The defender is unlikely to feature in Saturday's clash with Watford at Vicarage Road, although Shaw was optimistic about his chances of a swift comeback on Saturday night.
Shaw, who has enjoyed a fine start to the season with Manchester United, was forced off early in the second half at Wembley after taking an accidental blow to the head in a collision with Dani Carvajal.More news: Trump Jr. says father trusts few people after anonymous op-ed
Shaw looked great in the match against the Spaniards too. Shaw issued a tweet to say that he is doing fine although he will have to be monitored ahead of going back to his club.
Following the injury, Gareth Southgate said the injury-plagued defender will follow concussion protocols and be inactive for seven days 'but he should be back in the fold as soon as that's done'.More news: Donald Trump Branded 'Insensitive' After Double First Pump Ahead Of 9/11 Memorial
Shaw collided with Dani Carvajal while challenging for the ball before falling backwards and bouncing his head off the ground.
"He's sat up in the dressing room, talking and seems fairly comfortable", the England manager said. "We'll have to assess him a bit more, but that's definitely a good sign".
The report also claimed that the left-back will miss the Red Devil's Champions League clash against Young Boys next week.More news: Gov. McMaster declares state of emergency ahead of storm arrival
Shaw has made a stunning comeback to form this season and has arguably been Manchester United's best player in their opening four games.