Sixth seed Ons Jabeur and former champion Caroline Wozniacki fell victim to exciting young Russians in the Australian Open second round Wednesday as Novak Djokovic prepared to resume his quest for a 25th Grand Slam title. The veteran pair were no match for Mirra Andreeva and Maria Timofeeva, who emphatically stamped their mark on the opening Grand Slam of the year, which was marred by rain on day four. But fourth seeds Coco Gauff and Jannik Sinner, along with home hope Alex de Minaur and world number 11 Barbora Krejcikova, had no trouble progressing.