In the 49th minute, with the score at 1-2 in favour of the visitors, Shaw and Carvajal both leapt for a high ball.
Shaw tweeted after the match, thanking fans for the supportive messages he had received, and assured everyone that he is "doing fine" and "in the best hands". I'm a fighter so I will be back soon!' The familiar chants from the summer could be heard throughout the game as the Three Lions supporters let manager Gareth Southgate know "he's the one" and that "football is coming home again".
Southgate said: 'He's sat up in the dressing room and talking and seems fairly comfortable.
"It's hard to tell whether he was unconscious".
The 23-year-old, making his first global start since 2015, performed superbly at Wembley down the left hand side and laid on a wonderful assist for Marcus Rashford.
"We'll go through some test". It was a nasty fall and collision.
Danny Rose came on for Shaw at left-back as the tempo of the match slowed immediately following the Manchester United player being carried off the field, with neither side fashioning any real chances in the following 15 minutes.
Shaw, who revealed this week he came close to losing his leg after a serious break suffered while playing for United against PSV in 2015, was making his first global appearance for 18 months. We've thrown him in after a few games of the season.
"That balance of having a left footer, with him and Danny [Rose], was an advantage in several situations".
Two minutes later Carvajal rounded Shaw and squared to Rodrigo, who cut the ball back to Saul for a first-time finish inside Jordan Pickford's near post.