Carlos Alcaraz and Jannik Sinner are set for more world domination in 2026, starting at the Australian Open, while Aryna Sabalenka is bubbling with confidence as she chases further Grand Slam success.The new season gets under way on Friday with the mixed-teams United Cup in Perth and Sydney, headlined by women's world number two Iga Swiatek and men's world number three Alexander Zverev.Top-ranked Sabalenka, who is pursuing a third Melbourne Park trophy, starts at the Brisbane International from