Australian Open Final Preview: Naomi Osaka and Petra Kvitova relaxed and ready to go

Naomi Osaka and Petra Kvitova have never faced each other. Neither have won the Australian Open. Neither has ever been World No.1. All that changes on Saturday, as the two champions face-off in the Australian Open final, with the winner also being crowned the new WTA World No.1. Osaka and Kvitova join Senior Writer Courtney Nguyen in Melbourne, to reflect on their different journeys to Saturday's final, and reveal how they've managed to keep their heads on straight in the first Slam of the season.