Not much room for error: six-time Australian Open champions Serena Williams and Novak Djokovic face tougher-than expected first-round matches on Tuesday.
Both are chasing records at Melbourne Park, where Williams is hoping to set an Open-era record by winning her 23rd Grand Slam title and Djokovic is striving to be the first man to win the Australian title seven times.
Williams, who lost to Angelique Kerber in last year's final, has drawn Belinda Bencic, who was seeded 12th here last year and who beat her in Toronto in 2015. Their career record is 1-1, with Williams having beaten Bencic on clay at Madrid in 2014.
Bencic advanced to the fourth round at Melbourne Park...