With the Australian Open getting under way on Sunday, Andy Schooler assesses the leading contenders and picks out some dark horses from further down the Australian Open betting market. Novak Djokovic – 1/1 World ranking (as of Jan 8): 1 Tournament history (most recent 1st): W-W-W-W-4R-2R-W-W-QF-W-W-W-QF-QF-W-4R-1R-1R Best Grand Slam performance: Winner, 24 times 2024 record…