The Argentina star still hasn't officially become a United player despite being with them for the past seven days.
It's now highly unlikely Tevez will feature in the Premier League opener against Reading on Sunday, even if his transfer is completed on Friday.
He's likely to make his United debut in the Manchester derby against City at Old Trafford on Sunday week.
Ferguson told Sky Sports News: "It is completely understandable the Premier League want to scrutinise every detail.
"I am happy with that because then we know we are getting a player in the right circumstances, with everything clarified and cleared by the appropriate authorities.
"We know he is our player but even if it was all done today, I wouldn't use him on Sunday. It would more likely be against Manchester City next weekend."