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RIO DE JANEIRO, BRAZIL - AUGUST 17: Naomi van As of the Netherlands shoots at goal under pressure from Nike Lorenz of Germany who was hit on the head with her stick during the womens semifinal match between the Netherlands and Germany on Day 12 of the Rio 2016 Olympic Games at the Olympic Hockey Centre on August 17, 2016 in Rio de Janeiro, Brazil. (Photo by Mark Kolbe/Getty Images)

RIO DE JANEIRO, BRAZIL - AUGUST 17:  Naomi van As of the Netherlands shoots at goal under pressure from Nike Lorenz of Germany who was hit on the head with her stick during the womens semifinal match between the Netherlands and Germany on Day 12 of the Rio 2016 Olympic Games at the Olympic Hockey Centre on August 17, 2016 in Rio de Janeiro, Brazil.  (Photo by Mark Kolbe/Getty Images)