Manchester United have been dealt a blow with the news that Owen Hargreaves requires another month on the sidelines.
The England international had been tipped to make his comeback in Tuesday's UEFA Champions League clash with Roma.
However, Hargreaves felt his knee in training on Monday and now United have opted to give him an injection in his knee.
The news of the ex-Bayern Munich ace's absence also means he misses England's Euro 2008 qualifiers later this month against Estonia and Russia.
"Owen will be out for three to four weeks," Ferguson confirmed following the side's 1-0 win over the Giallorossi.
"It was always an option we had and he has had an injection to try and get rid of the tendinitis in his right knee.
"He felt it in training yesterday so we decided to get it done."