Roger Federer, Eugenie Bouchard, Ana Ivanovic, Victoria Azarnka, Nick Kyrgios and Thanasi Kokkinakis took center court Saturday alongside Nickelodeon’s SpongeBob SquarePants, Teenage Mutant Ninja Turtles, Dora the Explorer and Justice Crew at the sold out Australian Open Kids Tennis Day in Melbourne.

The event featured a Tennis Legends exhibition match, a celebrity rally and a host of Nickelodeon-themed activities such as face painting, balloon artists, autograph signing, photo opportunities and a number of live shows including "Nickelodeon’s Slime Time."