Britain's Emma Raducanu showed quality and resilience to beat American Sloane Stephens in three sets for a spot in the Australian Open second round.

Raducanu, seeded 17th, was sharp as she wrapped up the first set in 17 minutes before errors crept into her game.

Stephens took advantage to level but Raducanu reasserted control to win.

The 19-year-old will face Montenegro's Danka Kovinic in the second round on Thursday.

Raducanu cupped her head and dropped the racquet in what is becoming a trademark celebration, illustrating how much it meant to win her first Grand Slam match since Flushing Meadows.

"Both me and Sloane put everything out there and it was a very good match," said Raducanu, who wrapped up victory shortly before midnight and thanked an excited crowd for staying.

"We had some great rallies and I'm happy to come through against such a great champion."

Raducanu shines again on biggest stage

Intrigue has surrounded Raducanu going into the 2022 season as everyone wonders how she will follow her stunning ascent to the US Open title.

Eyebrows were raised when her opening match of the year ended in a 6-0 6-1 defeat by Kazakhstan's Elena Rybakina in Sydney.

Wins have been hard to come by since her stunning victory in New York, but she showed again in Melbourne how much she thrives on the big stage.

With her pre-season preparation limited by contracting Covid-19, Raducanu lost to Rybakina in 55 minutes.

Against Stephens, it looked like Raducanu might be wrapped up even earlier a week on - this time for wildly different reasons.

Stephens, who won the 2017 US Open, had not played for two months and only arrived in Australia recently after getting married on New Year's Day in the US.

Her lack of on-court time showed as she won only four points in an error-strewn opening set.

The second set completely switched. Raducanu was the one who started to make mistakes - racking up 19 unforced errors compared to only two in the first - and 28-year-old Stephens took advantage to level.

Raducanu, who had never played a deciding set in a Grand Slam main-draw match, broke serve twice to race 5-0 in front in the final set.

Three match points quickly arrived in the seventh game and, after a brief delay caused by an intruding moth on the baseline, Raducanu took the final match point when Stephens flicked into the net.

"It was a tough match-up for a first round," said Raducanu.

"I knew there would some long rallies because her athleticism is right up there. I had to work extremely hard for those points.

"Coming out for the first set, I played very good tennis, but of course there was always going to be some adversity. I'm happy to have regrouped in the third set.

"I don't think the scoreline reflected what happened in the third set."

Analysis

BBC tennis correspondent Russell Fuller at Melbourne Park

The Emma Raducanu of the first set looked every inch the player who had steamed through the US Open draw without dropping a set.

The 19-year-old, bursting with confidence, allowed Sloane Stephens only four points. She was decisive, aggressive and utterly dominant.

Back came Stephens, though, to leave Raducanu in unchartered territory - a first deciding set in a Grand Slam match.

That final set was closer than the scoreline suggests, but Raducanu took all her chances and then showed great delight at the moment of victory.

Grand Slam wins should always be a big deal when you are a teenager, and given the thrashing she received by Elena Rybakina in Sydney last week, this was a win full of character by the US Open champion.