HAMBURG, GERMANY - JULY 26: Alexander Zverev of Germany in action during the Hamburg Open 2019 at Rothenbaum on July 26, 2019 in Hamburg, Germany. (Photo by Alexander Scheuber/Getty Images for Hamburg Open)
HAMBURG, GERMANY - JULY 26: Alexander Zverev of Germany in action during the Hamburg Open 2019 at Rothenbaum on July 26, 2019 in Hamburg, Germany. (Photo by Alexander Scheuber/Getty Images for Hamburg Open)