De Jong previously explained the significance of No 21 to him, insisting he wears it as a tribute to his late grandfather. “I feel comfortable with this number,” said the midfielder. “I could easily play another number, you know, no problem, but it’s nice that it also gives people a way to recognize me. “I brought my whole family to my presentation in Barcelona, except my grandfather Hans de Jong, my father’s father. Want the new Man Utd shirt? click here to buy it.