The 32-year-old former Brazilian international suffered the injury during the first-half of the 1-0 League Cup final defeat to Bordeaux on Saturday.

Juninho -- who played on but eventually had to go off in the 68th minute -- underwent a scan on Monday which revealed the extent of the problem.

Juninho -- who is in talks about extending his present contract by two years to 2010 -- will miss Saturday's league match with Valenciennes and is doubtful for the following one against strugglers Sedan on April 14.

Despite the disappointment of the League Cup loss and exiting the Champions League Lyon look certain to secure their sixth successive title as they lead Lens by 16 points and have a game in hand.