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Sporting's Algerian forward Islam Slimani (down) celebrates a goal with his teammate Sporting's forward Carlos Mane (up) during the UEFA Champions League play off football match Sporting Portugal vs CSKA Moscow at the Jose Alvalade stadium in Lisbon on August 18, 2015. AFP PHOTO / PATRICIA DE MELO MOREIRA (Photo credit should read PATRICIA DE MELO MOREIRA/AFP/Getty Images)

Sporting's Algerian forward Islam Slimani (down) celebrates a goal with his teammate Sporting's forward Carlos Mane (up) during the UEFA Champions League play off football match Sporting Portugal vs CSKA Moscow at the Jose Alvalade stadium in Lisbon  on August 18, 2015.  AFP PHOTO / PATRICIA DE MELO MOREIRA        (Photo credit should read PATRICIA DE MELO MOREIRA/AFP/Getty Images)