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Alexander Zverev beats Daniel Altmaier 7-6 (7-3) 6-1 7-6 (7-1)
World number one Ashleigh Barty hammers Lesia Tsurenko 6-0 6-0
GB's Cameron Norrie loses 6-3 6-0 6-4 to Sebastian Korda
Rafael Nadal into second round, beating Marcos Giron 6-1 6-4 6-2
Defending champion Naomi Osaka defeats Camila Osario 6-3 6-3
Nine-time champion Novak Djokovic absent after being deported
Day one of Australian Open from Melbourne Park
*Barty 6-0 2-0 Tsurenko
Laura Robson
Former British number one on BBC Radio 5 Live
That was a really nice injection of pace from Barty. Tsurenko on the back foot.
Tsurenko now just overplaying it slightly.
The crowd is very pro-Barty but I think even they would like Tsurenko to get on the board here.
*Barty 6-0 2-0 Tsurenko
A break point for Barty, after picking up the pace on the forehand and forcing her opponent to go long.
Tsurenko folds weakly though with a double fault to gift Barty her eighth game in a row. This one could be over very soon.
Norrie 3-6 0-6 4-6 Korda
Naomi Broady
British player on BBC Radio 5 Live
It's so important to get a good off-season. The tennis season is almost 11 months of the year.
A lot of players take a lot of confidence, so if Norrie feels like he hasn't done that - it sounds like he doesn't feel ready to start the new year.
Barty 6-0 1-0 Tsurenko*
The second set continues like the first, with Barty storming through her opening service game. Tsurenko will just be hoping to get a game on the board at the moment.
*Barty 6-0 Tsurenko
Lesia Tsurenko only won 12 points in that entire opening set and is just being outclassed at the moment.
British number one Cameron Norrie is out of the Australian Open after a straight set beatdown by Sebastian Korda.
Norrie was beaten 6-3 6-0 6-4 by the rising American star.
It means that Norrie, who enjoyed such a stellar 2021, has lost all four of his matches this season.
"I was never really in the match at all," Norrie said afterwards.
"I played a loose game at the start of every set and he took care of his serve very well. I am disappointed with my level throughout."
Image source, ReutersSeventh seed Iga Swiatek, who shot to fame after winning the 2020 French Open aged just 19, begins her campaign against Britain's Harriet Dart tomorrow.
Swiatek is writing a regular column for BBC Sport - in her first, she discusses coping with the attention of being such a young major champion and dealing with her own expectations.
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*Barty 6-0 Tsurenko
Laura Robson
Former British number one on BBC Radio 5 Live
I don't really know what Tsurenko can do differently to get herself back in the match.
What can she do to come out in the second set to try and change the momentum?
*Barty 6-0 Tsurenko
Barty's first set point sees a forehand go long, but there's still another on the table.
A forehand goes long from Tsurenko and that is a 24-minute whitewash in that opening set.
A bagel for Tsurenko. Easy, very easy for Barty.
Image source, Getty ImagesSet points for Ashleigh Barty, who has been flawless.
Barty 5-0 Tsurenko*
A forehand crosscourt attempt from Tsurenko drifts out and after 19 minutes world number one Ashleigh Barty is already in cruise control.
Five games to her, none to her opponent.
Lesia Tsurenko now serving to stay in the opening set.
*Barty 4-0 Tsurenko
Laura Robson
Former British number one on BBC Radio 5 Live
It doesn't really even feel like Barty is playing her best tennis.
I feel like she's got another gear or two to come.
*Barty 4-0 Tsurenko
Tsurenko, broken in her first service game, flaps a forehand into the net and that is a 0-30 lead as Barty is threatening to run away with this one.
The Australian soon reaches break point and a blocked forehand from the Ukrainian goes long and Barty has stormed into a 4-0 lead in the opening set.
Barty 3-0 Tsurenko *
Laura Robson
Former British number one on BBC Radio 5 Live
Barty is just looking a much more well-rounded player than Tsurenko, at this point.
Barty 3-0 Tsurenko*
It was hard work, but Ashleigh Barty gets through that game after saving two break points to do so.
We've got a half-full Rod Laver Arena after the Australian authorities shut down ticket sales last week because of Covid-19 restrictions.
*Barty 2-0 Tsurenko
But Tsurenko has a second chance for a break as Barty can only find the tape. The opportunity is not around for long though as Barty drills down an ace to save her second break point.
*Barty 2-0 Tsurenko
Good fighting spirit from Tsurenko as she battles to earn an immediate break point down.
Barty misses her first serve, but sends in a forehand winner, which is just in to save the immediate danger. Deuce.
#bbctennis
As always, we want all your thoughts on the tournament so send us your messages on Twitter, via #bbctennis.
Let's start off with some predictions. Who are going to be the men's and women's champions, and why?
*Barty 2-0 Tsurenko
A disastrous start for the world number 120. It's only taken a few minutes as Ashleigh Barty gets the break of serve at the very first opportunity.
After a lengthy baseline rally, Tsurenko can only send a sliced backhand long and the Australian gives the fans what they are after with an early break.
Barty 1-0 Tsurenko *
Laura Robson
Former British number one on BBC Radio 5 Live
We just had the best view of that Barty slice that went so far wide of the line... and then just dropped in.
It is one of her best shots by far.