Kammala jumla mai zuwa: A lokacin rukuni na rukuni na gasar zakarun Turai na kakar wasa ta bana, Costa ya yi nasarar sauya sau uku kawai, jimillar minti 23, yayin da Shakhtar ya gama na biyu a rukunin bayan
Zakarun Serie A Juventus, yayin da suka fitar da masu rike da Chelsea daga gasar. Bayan rashin nasara a farkon rabin shekarar 2012-13, Costa ya fito daga benci don zira kwallaye mai mahimmanci a wasan farko na Shakhtar 2-2 da Borussia Dortmund a zagaye na 16 na gasar zakarun Turai a ranar 13 ga Fabrairu 2013.