Manchester United manager Sir Alex Ferguson believes Paul Scholes sustained medial ligament damage during tonight's Champions League match against Aalborg and revealed the midfielder could be out for six to eight weeks.
Scholes had to be substituted after 16 minutes against United's Danish opponents.
Although the team managed well without him, winning 3-0 in their Group E match, the loss of Scholes potentially until late November will be a significant blow to United.
The former England international was replaced following a challenge with Thomas Augustinussen.
Ryan Giggs came on as his replacement, and laid on the first goal for Wayne Rooney.
Speaking after the match, Ferguson revealed Scholes may face a lengthy lay-off, denying him the services of the 33-year-old whose experience is valued in the United midfield.