Britain's Andy Murray loses five-set epic to Roberto Bautista Agut at Australian Open
Spaniard Bautista Agut wins 6-4 6-4 6-7 (5-7) 6-7 (4-7) 6-2
Epic first-round match could be Murray's last because of hip injury
But he tells fans 'Maybe I'll see you again. I'll do everything possible to try'
Kyle Edmund loses 6-3 6-0 7-5 to Tomas Berdych, Dan Evans wins but Cameron Norrie goes out
Katie Boulter makes second round but Harriet Dart and Heather Watson are out
Federer, Nadal, Wozniacki and Kerber all win on day one
Sharapova 6-0 3-0 Dart*
Maria Sharapova is in a pretty ruthless mood, but she'll want to eradicate these double faults from her game as she moves into the latter rounds.
One gives Harriet Dart a bit of confidence at 30-30, but the Briton fires wide after an exhausting rally and slams her racquet down in disgust at that miss.
Sharapova latches on to a high ball to volley beyond the frustrated qualifier and hold serve.
David Law
BBC Radio 5 live tennis commentator at Melbourne Park
I don't feel like the performance of Dart is embarrassing in any way - unfortunately for her Sharapova is right on it.
*Sharapova 6-0 2-0 Dart
A wickedly spinning slice from Maria Sharapova and Harriet Dart can't eek out a controlled response.
Sharapova breaks. That's eight games on the bounce.
Sharapova 6-0 1-0 Dart*
Maria Sharapova whips it into the net with a yelp, back to deuce... and a wonderful forehand winner from Harriet Dart that kicks up off the whites of the line.
Advantage Dart, but she can't take it. Another chance to break for the Russian.
Sharapova 6-0 1-0 Dart*
That turned around quickly.
A couple of loose strokes from Harriet Dart and she's a break point down.
David Law
BBC Radio 5 live tennis commentator at Melbourne Park
It's tough for Dart - she's not playing that badly. She's in games but she's not won any of them.
Sharapova 6-0 1-0 Dart*
Punishing forehand from Harriet Dart to get Maria Sharapova scuttling into the tramlines, now if she can just string a few of these together...
Sharapova 6-0 1-0 Dart*
So close, Harriet Dart goes just long and Maria Sharapova holds.
*Sharapova 6-0 0-0 Dart
Harriet Dart just can't quite get to grips with Maria Sharapova out on Rod Laver Arena.
The 22-year-old tries to mix up her groundstrokes, but a slice is so undercooked it comes off her strings as blue as Sharapova's dress and flops into the bottom of the net.
Better from Dart as she gets the Russian pedalling across the baseline - 40-30.
Jill Craybas
Former world number 39 on BBC Radio 5 live sports extra
Sharapova always comes out and starts matches really well. She is staying very aggressive and making a statement in the very beginning. And Dart hasn't been able to make any adjustment to that.
Sharapova 6-0 Dart
Harriet Dart rallies to stave off the first, punching a winner close to the tramlines.
But then the Briton can only loft a fiery passing stroke from Maria Sharapova wide and the Russian takes the opening set to love.
Sharapova 5-0 Dart*
Harriet Dart looking to get on the board for the first time in this match, but she's met with a charging Maria Sharapova and the Russian just comforts a winning volley over the net from close range.
That won't help Dart's cause, over-egging her second serve to throw away a double fault.
She looks a little frustrated, and a lovely lobbed winner hands Sharapova two set points...
Image source, AFPWatson 1-6 0-2 Martic
Heather Watson is a set down against 31st seed Petra Martic, losing the opener 6-1 - and she's now 2-0 down in the second.
*Sharapova 5-0 Dart
Maria Sharapova has a few words with the umpire regarding the time taken between serves, and then wraps up another service game. She's 5-0 up.
David Law
BBC Radio 5 live tennis commentator at Melbourne Park
Katie looks totally at ease here. That has been a cakewalk. She was quite fantastic. She just played an amazing set of tennis.
*Sharapova 4-0 Dart
Brilliant stuff from Harriet Dart, lofting the ball high into the Melbourne sky and making Maria Sharapova work to bring up another deuce.
Dart slices a ball narrowly over the net, drawing Sharapova in, but the Russian shows deft hands to dink it back into the space left behind by the world number 132.
Image source, AFPWow, that was quick - Katie Boulter has whizzed through the first set against Ekaterina Makarova. Just 27 minutes on the clock and the young Briton has one foot in the next round...
*Sharapova 4-0 Dart
Maria Sharapova bides her time at the baseline, and hammers down another double... two in this service game, three in the match. That's deuce.
Harriet Dart leaves her return short and Sharapova leaps into it to smash beyond the 22-year-old qualifier before rattling the tape after a prolonged baseline exchange.
Deuce again.
Jill Craybas
Former world number 39 on BBC Radio 5 live sports extra
Sharapova does have that presence where she is a little bit intimidating.
*Sharapova 4-0 Dart
Second double fault of the match from Maria Sharapova, cloaked in light blue and blending into the Rod Laver Arena surface like a racquet-wielding chameleon.
We're seeing rare glimpses of Harriet Dart's talent - a backhand winner that beats Sharapova gets the Australian crowd going. That's 30-30.