Greek international striker Giorgos Samaras will be out of action for at least a month after sustaining an arm injury playing for his country against Latvia in a World Cup qualifier on Friday, team doctors said. Medical tests after the 2-1 win showed that the 27-year-old Celtic star had suffered ligament damage in his left arm and will need four to five weeks to fully recover and be able to play again. Team doctors were expected to reassess the player’s condition again Sunday before Samaras departs for Scotland to rejoin his club on Monday. Samaras, a doubtful starter due to a previous back injury, was used by coach Fernando Santos in the second half for 22 minutes as a substitute and Greece down 1-0 at the time.