David de Gea was among those who tweeted Shaw and the injury would have affected him given the pair are club teammates.
The Manchester United left-back collided with Dani Carvajal minutes into the second half and received treatment on the pitch for seven minutes before being stretchered off.
Manchester United fullback Luke Shaw should be exclusively focused on football and not on signing a new contract, according to former Liverpool star Stan Collymoore.
The Real Madrid right-back requested Shaw's mobile number from his global team-mate to check on his condition after he had to be taken off on a stretcher following several minutes of treatment from medical staff.
"I'm a fighter, I'll be back soon", he wrote on social networks after the game in an attempt to reassure fans.
Shaw superbly set up Marcus Rashford's opener on his first England start since September 2015 - an appearance that came just a week before he suffered a disgusting double leg-break in a Champions League tie. The defender appeared to be wearing an oxygen mask as he was stabilized on a stretcher and then wheeled off the field.
"He's sat up in the dressing room, talking and seems fairly comfortable,"Southgate said". "We'll have to assess him a little bit more overnight and tomorrow, but that's definitely a good sign". His performances have sparked talk of a new contract offer from United, but Collymore believes the 23-year-old should focus on football. We'll go through some tests.