Greater Manchester Police said it had received a call of concern about the boy in the early hours of Saturday morning.

"We have looked after the child with an unhappy mum on her way down from [the North East] to collect him," the force's local Twitter account stated.

Around 9,500 away fans watched their team knock the home side out of the FA Cup in a penalty shoot-out on Friday following a 1-1 draw.

Middlesborough are seventh in the Championship table, a division below Manchester United, who are currently fourth in the Premier League.

The police tweeted: "Boro away fan arrested for child neglect last night, after choosing to leave his 11yr child in the hotel after the game whilst he went into town celebrating their victory drinking."

A spokeswoman for the force added: "In the early hours of Saturday 5 February 2022, police received a report of concern for the welfare of a child.

"Inquiries established that an 11-year-old boy was asleep alone in a hotel room in Trafford.

"A 35-year-old man has been arrested on suspicion of child neglect. He remains in police custody for questioning."