Summary

  • Rafael Nadal wins in straight sets 6-3 6-4 6-2 to reach semi-finals

  • Second seed plays Stefanos Tsitsipas next, who beat Roberto Bautista Agut in four sets

  • Petra Kvitova beat home favourite Ashleigh Barty 6-1 6-4 - plays Danielle Collins next

Live Reporting

Amy Lofthouse

  1. Gigi Salmon
    Radio 5 live sports extra tennis commentator at Melbourne Park

    It happens with Kvitova - she blows hot and cold.

  2. Barty holds

    *Kvitova 6-1 2-3 Barty

    Kvitova tries a bit of slicing of her own and spins her backhand over the baseline at 15-0.

    A rushed forehand from the Czech finds the bottom of the net and, as Kvitova's backhand drops over the baseline, Barty holds to love.

  3. Jonathan Jurejko
    BBC Sport at Melbourne Park

    beastie boysGetty Images

    "You've to fight for your right to.... BARRRR-TY!"

    Ladies and gentleman, we have a winner from the rowdy home fans next door.

    The Beastie Boys would be proud of their creativity.

  4. Kvitova holds

    Kvitova 6-1 2-2 Barty*

    Shot!

    Gorgeous from Kvitova, crouching low to send Barty's return of serve flying down the line.

    Advantage to the Czech - and she wrongfoots Barty to seal the hold!

  5. Kvitova saves break point

    *Kvitova 6-1 1-2 Barty

    Giant first serve from Petra Kvitova, and she comes tearing forward to deliver a furious forehand winner.

    Deuce.

  6. *Kvitova 6-1 1-2 Barty

    Now then.

    Break point to Barty as Kvitova goes too big on a forehand...

    Petra KvitovaEPA

  7. *Kvitova 6-1 1-2 Barty

    Another huge "pojd!" from Kvitova as she deals with Barty's slicing and dicing to get to 30-15 but she makes a meal of an attempted cross-court winner to bring Barty level.

    Too much drift on a Barty backhand puts Kvitova within touching distance of a hold, but Barty eats into Kvitova's second serve for deuce.

  8. They used to be the darlings of the sporting world. Now they play bowls...

    Middle age has kicked in, well and truly.

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  9. *Kvitova 6-1 1-2 Barty

    That's a great passing shot from Barty, beating a full-stretch Kvitova, and she makes a terrific one-two punch on serve for a 30-15 lead.

    Into the net goes Kvitova's return of serve, and a body serve wraps up a fine service game for Barty.

  10. Jill Craybas
    Former world number 39 on BBC Radio 5 live sports extra

    That was the first pressure Barty had imparted on Kvitova's serve.

    Ashleigh BartyGetty Images

  11. Kvitova holds

    Kvitova 6-1 1-1 Barty*

    What a strike that is from Kvitova, going straight at Barty, and the Australian gets enough racquet on the ball to force Kvitova into moving forward for a winner.

    Advantage, Kvitova - sealed as she comes to the net and rushes Barty's backhand!

  12. *Kvitova 6-1 0-1 Barty

    Ace number two from Petra Kvitova gives her the advantage.

    She just misses a third, and then a block return from Barty draws the error out of Kvitova's forehand.

    40-40.

    Petra KvitovaAFP

  13. Gigi Salmon
    Radio 5 live sports extra tennis commentator at Melbourne Park

    What a time to serve up your first ace!

  14. Kvitova saves break point

    *Kvitova 6-1 0-1 Barty

    And, as calm as you like, Petra Kvitova zips down an ace.

    Deuce.

  15. *Kvitova 6-1 0-1 Barty

    A double fault from Petra Kvitova is welcomed by the Australian crowd, but the Czech nails her next serve for 15-15.

    Kvitova twice mishits on her backhand - the first one costs her, the second doesn't as an off-balance Barty nets.

    What a shot that is though! Barty angles a demon of a return down the line and Kvitova, reaching, blocks the ball out. Break point to Barty.

    Ashleigh BartyAFP

  16. Jonathan Jurejko
    BBC Sport at Melbourne Park

    Barty's difficult start hasn't dampened the enthusiasm of one group of home fans just next to the media seats.

    There are about 20 of them, all wearing those aforementioned yellow 'Aussie!' tees, jumping to their feet and chanting after every game.

    A rendition of “If you love Ash Barty, clap your hands!” after she gets on the scoreboard ends with much of Laver enthusiastically joining in at the end.

    Australian OpenBBC Sport

  17. Barty holds

    Kvitova 6-1 0-1 Barty*

    Better, much better from Ashleigh Barty.

    She draws the errors out of Petra Kvitova's service returns, and an ace down the T wraps up a hold to 15.

  18. Kvitova 6-1 0-0 Barty*

    Right, Ash Barty will serve to get the second set under way.

  19. Jill Craybas
    Former world number 39 on BBC Radio 5 live sports extra

    It's an incredible performance. There's not much Barty could have done, really. She's just been forced on to the back foot.

    KvitovaEPA

  20. Twelve winners, 11 unforced errors, 75% of net points won and 71% of points won on first serve.

    Petra Kvitova is not messing around.

    If Ash Barty can stay with her though, she should be able to entice a few more errors out of those big shots...