Anthony Martial
Anthony Martial was substituted during Manchester United's loss to Watford Getty Images

Manchester United winger Anthony Martial has revealed he is feeling "much better" following the clash of heads during the Reds' 3-1 loss to Watford on Sunday (18 September). The 20-year-old Frenchman had to be withdrawn during the first half at Vicarage Road amid fears he had suffered a concussion after colliding with Daryl Janmaat.

Martial appeared to be dazed as he received treatment on the pitch and was ultimately withdrawn by manager Jose Mourinho. He has now taken to Twitter to reassure United fans he is feeling better, and to thank them for their concern.

"Feel much better today. Thanks for all your support and your messages!" Martial – who joined United from Monaco in 2015 – tweeted.

Martial lost the ball in the build-up to Watford's opening goal, with United's bench protesting he had been fouled and that the goal should have been ruled out. After the match, Mourinho admitted he did not know the extent of Martial's injury.

"I had to be on the game at that time and not worrying with Anthony," the United boss shared, according to the club's in-house TV station MUTV. "I have not had time to see about the situation. It wasn't an action to go to hospital. It was an action for a free-kick against Watford and obviously not a goal.

"I didn't know why he came off, whether he was injured in his knee, his ankle or his head. I don't know. I just know, in that moment, he is not in a condition to carry on. I don't know why. I just know I had to change. I don't know yet what happened."

It remains unclear whether Martial will be available to face Northampton Town in the EFL Cup on Wednesday (21 September). The forward has yet to score for United so far this season and was dropped for their recent derby loss against Manchester City at Old Trafford.