The 21-year-old managed to get through Manchester United's Champions League clash with Inter Milan due to jabs to control the pain he still feels in his ankle.
The Northern Ireland international admits he cannot bear the thought of sitting out his first major final for Manchester United.
"It's not nice to even think about it," Evans said.
Gutted"The manager has tried to tell me if I miss it, it's no big thing, but I would be quite gutted. I suppose my chances are the same as last night.
"In a way, that game was more important because there weren't many other options.
"That won't be the case on Sunday. But hopefully the manager will allow me to have a few more injections."
Sir Alex Ferguson has been short of central defenders for most of the season, leading Evans to make 22 appearances in the Manchester United defence.
The youngster was not anticipating being promoted to a regular first team place so soon in his career at Old Trafford.
"I wasn't expecting to play anywhere near that number," he added.
Risk"I got a game or two early in the season but it was when Rio Ferdinand got injured during the Club World Cup in Japan that we really got stuck for defenders and I got the opportunity to play a bit."
Evans is aware of the risk he is taking by having the injections and recognises that he cannot put of treatment on the troublesome ankle for much longer.
He said: "It is more like a bone bruise on the inside of my ankle.
"Maybe I have done a bit of damage there because it keeps hurting and coming back.
"It is not nice to keep struggling on, so I am going to have to get it sorted at some point in the future.
"Hopefully I can get through to the summer and then maybe have a month off. For now it is a case of hoping I don't get a bang on it or mis-kick."