Striker's injury a concern for United before Milan clash

Rooney's knee a worry for Ferguson as Man U aim to reach final eight

MANCHESTER, England - Manchester United could go into their last 16 second leg Champions League tie against AC Milan at Old Trafford on Wednesday without star striker Wayne Rooney.

United manager Sir Alex Ferguson was angry the in-form Rooney, who has scored 29 goals already this season - including two in the first leg against Milan - played for England in last week's friendly win over Egypt at Wembley.