MELBOURNE, AP:

As a first-time dad with a baby at home, Novak Djokovic could see merits in the tale of Serena Williams' mid-match espresso that has been brewing in the lead-up to the Australian Open.

The number one seeds in the men's and women's draws both had straight-set wins in their first-round matches yesterday.

Djokovic shrugged off the effects of a cold to beat number 116-ranked Aljaz Bedene 6-3, 6-2, 6-4 in his first Grand Slam match as a father, and Williams beat No. 106-ranked Alison Van Uytvanck 6-0, 6-4.

Williams, with five Australian titles in her collection of 18 majors, didn't need anything to perk her up as she raced through the first set in 21 minutes.

It was a vastly different story when she arrived in Australia, jet-lagged, this month to start her preparations for the season's first major, and asked for a coffee during a Hopman Cup match in Perth.

Djokovic won the first of his Australian Open titles in 2008, then three in a row from 2011.

US Open finalist, Kei Nishikori, and Wimbledon semifinalist, Milos Raonic, are part of the next generation of serious major contenders, and both opened their campaigns well.

Wimbledon champion, Petra Kvitova, and number six, Agnieszka Radwanska, advanced, along with 2014 Australian finalist Dominika Cibulkova, two-time champion Victoria Azarenka, and Venus Williams.

Serena Williams has only ever lost once in the first round of a major. she's playing her 58th.