German police said the 32-year-old man suffered a serious head injury in a violent confrontation with two Schalke supporters on 20 February.
A 30-year-old man was detained by Gelsenkirchen police and is believed to be an associate of those Schalke”ultras”.
A friend of this fan’s family said he was”receptive” but cannot talk.
In a forum post, the friend said:”He’s now awake and out of coma, he’s responsive and may squeeze our hands and nod responses to yes or no questions.
“he’s not able to talk at this time due to the tracheostomy tube still in place, the doctors have checked his neck and therefore are confident he’ll be able to talk back again.
“He’s started a few physio which will have to be continued when back in the United Kingdom. When he proceeds to improve they’re looking at bringing him home next 7-10 days”
City won the first leg of this last-16 tie 3-2 and certainly will face Schalke in the second leg at Etihad Stadium on Tuesday.