2014 Australian Open Junior Championships [Getty Images]

MELBOURNE, AUSTRALIA - JANUARY 20: Alexander Zverev of Russia plays a forehand in his first round doubles match with Andre Rublev of Russia against Alex de Minaur of Australia and Daniel Hobart of Australia during the 2014 Australian Open Junior Championships at Melbourne Park on January 20, 2014 in Melbourne, Australia. (Photo by Mark Kolbe/Getty Images)

Getty Images Sport Mark Kolbe