"She needed to do (that) to regain her confidence", he said Tuesday from Victoria.
Bouchard admitted she had her eye on a clash with Williams as soon as the draw was made.
Playing her first Grand Slam since her infamous rant against the umpire at last year's U.S. Open final, the 37-year-old Williams seemed to have chose to move on from last September's incident that caused a furor across the world.
The 37-year-old mom has been making statements with her on-court fashion for quite some time.
Williams conceded only five points in racing through the first set before Maria saved face by finally getting on the board after dropping the opening nine games.
Williams will play Eugenie Bouchard in the second round.
Williams said: "It was pretty hairy there". So far this tournament, the seven-time Aussie Open champ has faced only three break points, won 81 percent of her first serves and has yet to drop a set. I was screaming at the same time she was screaming.
The Japanese star looked down and out against little known qualifier Kamil Majchrzak, losing the first two sets before the Pole began badly cramping.
Top seed Simona Halep avenged a first round loss to Kaia Kanepi at the US Open, by rallying to beat her in Melbourne in the first round 6-7 (2), 6-4, 6-2. He'll take on 2014 Australian Open champion Stan Wawrinka in the next round. The Serb starts against American qualifier Mitchell Krueger.
During her post-match presser, Williams described the look as a "Serena-tard", to the delight of the room. Her baby, Olympia, was born on September 1, 2017, and Williams was off the tour until last March. Maybe one day I will play with her in a big arena.
The younger Williams sister has no interest in that sort of comparison now.
"I wanted to be fit". That's the most important thing, because I have definitely had moments where I didn't enjoy it so much. That being said, I still think Serena will be too strong. "I got time to spend with my daughter so that mattered the most to me", she said.