The British tennis star was humbled 6-0 6-1 by Elena Rybakina in her first match since recovering from coronavirus, with the match lasting less than an hour.
Raducanu stunned tennis fans by winning the US Open as a qualifier last year but has only won two matches on the tour since her historic New York triumph but insists that she is learning from tasting defeat.
She told reporters: "After the match I got a box of balls and went straight to the practice court.
"I felt I could have done some things better and I wanted to try and fix it straight away, just leave with a better feeling about it.
"At the end of the day I just want to keep putting myself out there. Even if I keep getting knocked down, it's just about getting back up and basically just falling in front. You're one step better, you learn more."
The teenager is still confident that she can mount a challenge at the year's first Grand Slam in Melbourne and says she entered the tournament in Sydney for some valuable match practice.
She added: "I could have easily said it's too soon and just play next week, but I wanted to really give myself some competitive points and matches. I think this will help in putting me in a better place for next week."