Mack Horton and relay team get Australia off to golden start in Rio pool

• Horton labels win over Sun Yang in 400m freestyle one ‘for the good guys’
• Campbell sisters lead 4x100m relay team to victory in world record time
• Australia top of medal table after day one

Australia’s Mack Horton called his stunning Rio Olympic 400m freestyle win over China’s controversial Sun Yang a “win for the good guys”, as Australia came away from the pool on the opening day of action with two gold medals thanks to another victory – and a world record – in the women’s 4x100m freestyle relay.

Horton, 20, became the first Australian since Ian Thorpe (2004) to claim the Olympic 400m freestyle crown, clocking a personal best three minutes, 41.55 seconds to seal the stirring win ahead of defending champion Yang and third-placed Gabriele Detti of Italy.