MELBOURNE, Australia—Within an hour of her third-round loss at the Australian Open, defending champion Naomi Osaka had consigned it to the past. It’s part of her new resolution for 2022. No dwelling on what’s already happened. Osaka had two match points against 60th-ranked Amanda Anisimova in the third set Friday, and she missed two backhands. Anisimova held serve to force a tiebreaker, which she dominated, and finished with an ace for a 4–6, 6–3, 7–6 (5) comeback victory over the four-time major champion. In doing so, the 20-year-old American ensured that the so-called final-before-the-final—a much-anticipated fourth-round showdown between Osaka and top-ranked Ash Barty—won’t happen. “I’m not sure if I’m going to have regrets about those two match points,” Osaka said. “Like, I thought she played really well. But I can’t really look in the past anymore, you know? “Like I just have to focus on what I can do in …