Easily beaten in the first set, the Canadian Bouchard, a former Wimbledon finalist who has been trying to retrieve her stellar form of five years ago, pressed early in the second to lead two games to one.
This was quite a return for Serena Williams. "When she's blasting returns, it's nearly intimidating".
World famous USA tennis player Serena Williams beat her German opponent Tatjana Maria 6-0 and 6-2 to advance to the second round in the Australian Open on Tuesday. "Mostly I'm just happy that I did most things pretty well".
Buzarnescu served for the match at 5-3 in the second set, but Williams broke at love there, then was superior in the tiebreaker that would follow.
The last time that Serena Williams played the Australian Open, she was two months pregnant and took home the trophy for her 23 major title in 2017.
The 37-year-old Williams called the romper "a Serena-tard".
"Maybe", Maria said afterward, "I was a little bit overwhelmed". She has Williams' full support.
Speaking on court, the world number one said: "I have no idea how I won tonight". "It's kind of weird walking back on, by myself this time".
Both Nishikori, who had dropped the opening two sets against qualifier Kamil Majchrzak, and Fognini advanced when their opponents retired mid-match.
The Serb blasted past American qualifier Mitchell Krueger 6-3, 6-2, 6-2 to set up a clash with Jo-Wilfried Tsonga, who he beat in Melbourne to win the first of his 14 Grand Slam crowns back in 2008.
Williams is a seven-time victor at the Australian Open.
And for all the talk of the unpredictability of the women's game, the story of the tournament so far has been the top players dominating.
Williams dispatched Germany's Tatjana Maria 6-0, 6-2 in her opener. And this day is going to be tomorrow.
Williams is the 16th seed but very much the title favourite, and this performance only reinforced that status as she eased to a 6-2 6-2 victory.
Court, 76, said ahead of the tournament that she doesn't worry about the prospect of being overtaken by Williams and can always take comfort from winning 40 Grand Slam doubles titles to go with her singles crowns.
It looks like Serena makes headlines because of her fashion on the court pretty often and this time it was no exception.
But what really caught the audience's attention was the fishnets that she wore underneath!
The younger Williams sister has no interest in that sort of comparison now.
"I don't want to give myself a ranking. I have so many memories from last time I was here". "I feel sorry for him".