After making the switch to Old Trafford from Vitesse Arnhem, the 23-year-old full-back could feature against Fulham on Saturday as the Red Devils contend with defensive injuries
The 23-year-old signed a five-year deal with the Red Devils earlier this week and could feature in United’s first home game of the season against Fulham on Saturday.
But Buttner, who signed from Vitesse Arnhem and will wear the number 28 shirt, knows that he will have to fight for a regular starting berth in Sir Alex Ferguson’s side.
"I feel good, it’s a dream for me to play for a big club like United," he told reporters.
"I can’t wait to play for the team and let people see what I can do. I know I have to wait for my chance. I can learn so much from Patrice and I cannot wait to play with him."
Sir Alex admitted he brought in Buttner as cover for Evra, but knows that the France international’s advancing years means he won’t be able to play through the season.
"Patrice has played an average of 48 games a season for the last five years, an incredible statistic," said the United manager.
"He's still a fit lad but he is in his 30s now and Alex gives us good back-up. He will provide Patrice with a good challenge."
United are suffering an injury crisis in defence which could lead to a debut for Buttner, with Sir Alex hinting at shifting Evra into the middle as they try to cope without the injured Rio Ferdinand, Jonny Evans, Phil Jones and Chris Smalling.
"It's pretty much the same as Monday night injury-wise,” he added. "Alex will be involved tomorrow because he gives that back-up. Evra could actually play centre-back. He has done in the past.
"But I don't think Alex will start tomorrow, I think he'll be on the bench."