The usual suspects aren’t going anywhere at this year’s Australian Open, which begins Monday. That’s especially true on the men’s side, where a restored Novak Djokovic is the prohibitive favorite to win his seventh Aussie Open title and 15th major overall. Returning from maternity leave, Serena Williams, who landed in world No. 1 Simona Halep’s section of the draw, is less likely to clinch a historic Grand Slam number 24, but the odds haven’t stopped her in the past. Beyond the favorites, here are six players who could slip into week two and contend for the big trophy Down Under.