Maria Sharapova has the second-best record among active women's players in first-round matches at the majors, and she gave an illustration of why that's the case with a ruthless 6-0, 6-0 win over Harriet Dart.
"I'm still working through some painful days".
The only break point Sharapova faced was when she double-faulted in the fifth game of the second set. "But, you know, I felt like I did all the right things today in order to get through that match".
It seemed Boulter wasn't told, fist-pumping and walking to the net at 7/4 before being reminded of the new rule.
Boulter beat Ekaterina Makarova 6-0, 4-6, 7-6 (6), including 10-6 in the tiebreaker.
Spain's 22nd seed Roberto Bautista Agut is the man who could draw the curtain on Murray's time in Melbourne, where he has been a five-time finalist.
Sharapova, who won the Australian Open in 2008, will meet Swede Rebecca Peterson in the second round.