Messi blow for Barca
Messi limped off after 21 minutes of the 4-1 win after injuring his left hamstring and he underwent further tests on Monday to determine the extent of the problem.
After receiving the results of those tests, Barcelona said the Argentinian is likely to be absent for between "six and eight weeks".
A Barca statement read: "According to the club's medical services, the tests taken on Monday morning by Leo Messi have confirmed that the player has suffered a torn muscle in the femoral biceps of his left leg.
"The approximate time he will be out is between six and eight weeks.
"The first part of his recovery will take place in Barcelona and the second, in Buenos Aires."
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