Leyton Hewett of Australia (L) and Roger Federer of Switzerland (R) are seen during a Rod Laver Arena Spectacular kids tennis day exhibition event on Centre Court ahead of the Australian Open tennis tournament at Melbourne Park, in Melbourne, Australia, 16 January 2016. The Australian Open tennis tournament runs from 18 to 31 January 2016. EPA/JULIAN SMITH
Novak Djokovic of Serbia looks on as he holds a novelty sword during a Rod Laver Arena Spectacular kids tennis day exhibition event on Centre Court ahead of the Australian Open tennis tournament at Melbourne Park, in Melbourne, Australia, 16 January 2016. The Australian Open tennis tournament runs from 18 to 31 January 2016. EPA/JULIAN SMITH
Ball kids perform during kids tennis day event a head of the Australian Open Grand Slam tennis tournament in Melbourne, Australia, 16 January 2016. The Australian Open tennis tournament runs from 18 to 31 January 2016. EPA/MADE NAGI
Roger Federer of Switzerland in action during a Rod Laver Arena Spectacular kids tennis day exhibition event on Centre Court ahead of the Australian Open tennis tournament at Melbourne Park, in Melbourne, Australia, 16 January 2016. The Australian Open tennis tournament runs from 18 to 31 January 2016. EPA/JULIAN SMITH
(L-R) Caroline Wozniacki of Denmark, Milos Raonic of Canada, Roger Federer of Switzerland, Lleyton Hewitt of Australia, Novak Djokovic of Serbia, and Victoria Azarenka of Belarus pose for a picture with Ninja Turtles characters during the Laver Arena Spectacular kids tennis day exhibition event on Centre Court ahead of the Australian Open tennis tournament at Melbourne Park, in Melbourne, Australia, 16 January 2016. The Australian Open tennis tournament runs from 18 to 31 January 2016. EPA/JULIAN SMITH
Topics: 10sballs_com, 2016 Australian Open, Atp World Tour, Caro Wozniacki, kids day, Lleyton Hewitt, Melbourne tennis, Novak Djokovic, Roger Federer, Sports, Tennis, Tennis Photos, Vika Azarenka, Wta