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Sporting's Algerian forward Islam Slimani (2nd L) celebrates a goal with teammate midfielder Adrien Silva (L) during the Portuguese league football match FC Porto vs Sporting CP at the Dragao stadium in Porto on April 30, 2016. / AFP / MIGUEL RIOPA (Photo credit should read MIGUEL RIOPA/AFP/Getty Images)

Sporting's Algerian forward Islam Slimani (2nd L) celebrates a goal with teammate midfielder Adrien Silva (L) during the Portuguese league football match FC Porto vs Sporting CP at the Dragao stadium in Porto on April 30, 2016. / AFP / MIGUEL RIOPA        (Photo credit should read MIGUEL RIOPA/AFP/Getty Images)