As a nine-year-old, Olivia "Liv" Lovelace was attempting to land tricks on her board surrounded by boys at a Sydney skate park. In the Park event, Keegan Palmer — reigning Olympic champion — and Kieran Woolley return for their second Games, while 14-year-old Arisa Trew and 15-year-old Ruby Trew both make their Olympic debut. It's just the second time skateboarding …