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Celtic's midfielder Gary Mackay-Steven (L) vies with Inter Milan's Brazilian defender Juan during the UEFA Europa League round of 32 second leg football match Inter Milan vs Celtic FC on February 26, 2015 at the San Siro Stadium stadium in Milan. AFP PHOTO / GIUSEPPE CACACE (Photo credit should read GIUSEPPE CACACE/AFP/Getty Images)

Celtic's midfielder Gary Mackay-Steven (L) vies with Inter Milan's Brazilian defender Juan during the UEFA Europa League round of 32 second leg football match Inter Milan vs Celtic FC on February 26, 2015 at the San Siro Stadium stadium in Milan.  AFP PHOTO / GIUSEPPE CACACE        (Photo credit should read GIUSEPPE CACACE/AFP/Getty Images)