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Celtic's Scott Brown celebrates after scoring a goal during the UEFA Europa League Group D match FC Salzburg vs Celtic FC on September 18, 2014 in Salzburg. AFP PHOTO / CHRISTIAN BRUNA (Photo credit should read CHRISTIAN BRUNA/AFP/Getty Images)

Celtic's Scott Brown celebrates after scoring a goal during the UEFA Europa League Group D match FC Salzburg vs Celtic FC on September 18, 2014 in Salzburg. AFP PHOTO / CHRISTIAN BRUNA        (Photo credit should read CHRISTIAN BRUNA/AFP/Getty Images)