SYDNEY, AUSTRALIA - JULY 13: Per Mertesacker of Arsenal celebrates scoring his goal during the match between Sydney FC and Arsenal FC at ANZ Stadium on July 13, 2017 in Sydney, Australia. (Photo by Steve Christo - Corbis/Corbis via Getty Images)
SYDNEY, AUSTRALIA - JULY 13: Per Mertesacker of Arsenal celebrates scoring his goal during the match between Sydney FC and Arsenal FC at ANZ Stadium on July 13, 2017 in Sydney, Australia. (Photo by Steve Christo - Corbis/Corbis via Getty Images)