Upsets were in short supply on the second day of the Australian Open ©Getty Images

"Photo_Gallery"

World number one Novak Djokovic cruised through his first round match ©Getty Images
World number one Novak Djokovic cruised through his first round match ©Getty Images
Alexander Zverev won impressively as he pursues a maiden Grand Slam title ©Getty Images
Alexander Zverev won impressively as he pursues a maiden Grand Slam title ©Getty Images
Australia's Nick Kygrios exited at the first round stage ©Getty Images
Australia's Nick Kygrios exited at the first round stage ©Getty Images
The Australian suffered defeat to Canada's Milos Raonic ©Getty Images
The Australian suffered defeat to Canada's Milos Raonic ©Getty Images
Women's world number one Simona Halep came from a set down to win her opening match ©Getty Images
Women's world number one Simona Halep came from a set down to win her opening match ©Getty Images
Serena Williams earned a straight sets win in less than one hour ©Getty Images
Serena Williams earned a straight sets win in less than one hour ©Getty Images
It marked Serena Williams' first Grand Slam match since her confrontation with umpire Carlos Ramos at the US Open ©Getty Images
It marked Serena Williams' first Grand Slam match since her confrontation with umpire Carlos Ramos at the US Open ©Getty Images
US Open champion Naomi Osaka earned a comfortable first round win ©Getty Images
US Open champion Naomi Osaka earned a comfortable first round win ©Getty Images
Action continued late into the night in Melbourne ©Getty Images
Action continued late into the night in Melbourne ©Getty Images