Messi doubt for Celtic clash

The 29-year-old suffered a hamstring injury during an Argentine match and has been doubtful for the game against Uruguay. In the end he was able to play the whole 90 minutes and scored.
Now, the Argentine returned to Barcelona and his physio said that he could miss Barceloan's game against Celtic.
Eventhough he publish a message on Facebook saying he's okay, Barcelona said he will probably not play.
Messi wrote on Facebook: "Everything is fine, I have to slow things down as I recover with physio, but it's nothing to worry about".
Barcelona's statement said someting different: "Tests conducted today on Leo Messi have confirmed that the player is still having trouble with the left adductor muscle. He has been recommended to lighten his training load over the next few days and his availability will depend on how the issue progresses".
Within the enxt few days we'll know more...