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Boston Celtics' head coach Brad Stevens looks on during their NBA Global Games Madrid 2015 basketball match Real Madrid vs Boston Celtics at the Barclaycard center in Madrid on October 8, 2015. AFP PHOTO/ GERARD JULIEN (Photo credit should read GERARD JULIEN/AFP/Getty Images)

Boston Celtics' head coach Brad Stevens looks on during their NBA Global Games Madrid 2015 basketball match Real Madrid vs Boston Celtics at the Barclaycard center in Madrid on October 8, 2015.    AFP PHOTO/ GERARD JULIEN        (Photo credit should read GERARD JULIEN/AFP/Getty Images)