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BARCELONA, SPAIN - APRIL 25: Alexander Zverev of Germany celebrates after winning a point in his match against Nicolas Almagro of Spain during the Day2 of the Barcelona Open Banc Sabadell at the Real Club de Tenis Barcelona on April 25, 2017 in Barcelona, Spain. (Photo by fotopress/Getty Images)

BARCELONA, SPAIN - APRIL 25:  Alexander Zverev of Germany celebrates after winning a point in his match against Nicolas Almagro of Spain during the Day2 of the Barcelona Open Banc Sabadell at the Real Club de Tenis Barcelona on April 25, 2017 in Barcelona, Spain.  (Photo by fotopress/Getty Images)