MELBOURNE, Australia (AP) — American teenager Coco Gauff has set up another showdown against Naomi Osaka in a Grand Slam tournament. Serena Williams, No. 1 Ash Barty and defending men's champion Novak Djokovic also all won on Day 3 at the Australian Open. Gauff erased deficit after deficit in a 4-6, 6-3, 7-5 victory over Sorana Cirstea to get to the third round. Now Gauff will face defending champion Osaka. This rematch comes less than five months after their memorable meeting at the U.S. Open. Osaka won that one in straight sets, then consoled a crying Gauff and encouraged her to address the crowd.