Manchester United forward Wayne Rooney could be out up to three weeks after suffering a knee injury in training, manager Sir Alex Ferguson said Wednesday.
Rooney missed United's 4-3 win over Newcastle on Wednesday and Ferguson confirmed the striker will miss the remainder of the holiday fixture schedule.
"It was a volley towards the end of training," said Ferguson. "He did a ligament at the back of his knee and could be out for two to three weeks."
Rooney would miss Premier League matches against West Brom and Wigan, in addition to the FA Cup third round tie at West Ham on January 5.
For Ferguson, the news was particularly disappointing given Rooney's poor performance at Swansea on Sunday.
"After his performance on Sunday I think he would have been brilliant today. You don't have two performances like he did on Sunday," said Ferguson. "Unfortunately we couldn't risk him."
Rooney's injury was part of a negative fitness update from the United boss on Wednesday.
And, while skipper Nemanja Vidic was on the bench against Newcastle, Ferguson did not want to use him after the centerback made his first start since September at the Liberty Stadium.
"We couldn't risk Vida after playing his first game," said Ferguson. "He had a bit of soreness in his knee, which is only to be expected after being out for so long."
Information from Press Association was used in this report.