In 2014, the Dutch finished second in their 2015 Women's World Cup qualification group, so they were set to qualification play-offs against Scotland. In the first leg of the playoff semifinal against Scotland, Martens scored in the tenth minute off a rebound from Vivianne Miedema. Martens scored again in the second leg of the playoff semifinal off an assist from Daniëlle van de Donk. The tie ended 4–1 on aggregate, sending the Dutch to the qualification play-off final against Italy. The Dutch beat the Italians on an aggregate score of 3–2, with Martens assisting Vivianne Miedema’s tie-winning goal in the second leg, sending them to compete in their first ever Women's World Cup tournament.