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MILAN, ITALY - AUGUST 28: Head coach Frank de Boer (L) reacts during the Serie A match between FC Internazionale and US Citta di Palermo at Stadio Giuseppe Meazza on August 28, 2016 in Milan, Italy. (Photo by Claudio Villa - Inter/FC Internazionale via Getty Images)

MILAN, ITALY - AUGUST 28:  Head coach Frank de Boer (L) reacts during the Serie A match between FC Internazionale and US Citta di Palermo at Stadio Giuseppe Meazza on August 28, 2016 in Milan, Italy.  (Photo by Claudio Villa - Inter/FC Internazionale via Getty Images)