Summary

  • Stefanos Tsitsipas beats champion Roger Federer to reach quarter-finals

  • 20-year-old Greek fights back to win 6-7 (11-13) 7-6 (7-3) 7-5 7-6 (7-5)

  • Second seed Angelique Kerber stunned 6-0 6-2 by Danielle Collins

  • Fifth seed Sloane Stephens loses to Anastasia Pavlyuchenkova 7-6 (7-3) 3-6 3-6

  • World number two Rafael Nadal beats Tomas Berdych 6-0 6-1 7-6

Live Reporting

Amy Lofthouse

  1. Federer 7-6 (13-11) 6-7 (3-7) 5-7 3-3 Tsitsipas*

    A love hold for Roger Federer, finished off with a drop shot that Tsitsipas gets to, and works into the net.

    Roger FedererReuters

  2. *Federer 7-6 (13-11) 6-7 (3-7) 5-7 2-3 Tsitsipas

    Hello.

    Umpire James Keothovang is on the phone - Tsitsipas has asked for the trainer at the next change of ends "for his legs."

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

    It's a cracking match - it's wonderful when a match lives up to expectation.

  4. Tsitsipas holds

    *Federer 7-6 (13-11) 6-7 (3-7) 5-7 2-3 Tsitsipas

    It's 30-15 as Federer misses a forehand out wide, under pressure from an approaching Tsitsipas, but the Greek works a forehand over and out.

    A huge return from Tsitsipas, but Federer has a chance to pass him - and he misses! 40-30.

    Tsitsipas whacks a second serve into Federer's backhand and the Swiss can do nothing with it.

  5. Federer 7-6 (13-11) 6-7 (3-7) 5-7 2-2 Tsitsipas*

    Advantage Federer, thanks to an ace out wide.

    And a down-the-line swipe outpaces Tsitsipas!

    Federer holds. Just.

  6. *Federer 7-6 (13-11) 6-7 (3-7) 5-7 1-2 Tsitsipas

    Stefanos Tsitsipas is well on top, surprising Roger Federer with a push down the line before whizzing a crushing forehand through his defences.

    Every time Federer gets in front, he lets fly with a loose shot. A backhand into the net takes us to deuce.

  7. *Federer 7-6 (13-11) 6-7 (3-7) 5-7 1-2 Tsitsipas

    OH!

    Outrageous defence from Stefanos Tsitsipas up at the net, blocking every shot Federer throws at him as he tries to pass, and he yells in celebration as he whips a backhand across Federer.

    Federer is on the board as Tsitsipas dumps a forehand into teh net but that's a stunning ace from Tsitsipas for 40-15.

    Shank from Federer. Game, Tsitsipas!

    TsitsipasGetty Images

  8. Jonathan Jurejko
    BBC Sport at Melbourne Park

    As we told you earlier, Stefanos Tsitsipas used to watch YouTube videos of Roger Federer in a bid to learn his trade.

    His eyes were glued to one match in particular... a young Federer's victory over Pete Sampras at Wimbledon in 2001.

    That match is often cited as the one which signalled the 'changing of the guard'.

    Could we be seeing another one of those moments tonight?

  9. Federer 7-6 (13-11) 6-7 (3-7) 5-7 1-1 Tsitsipas*

    Mirka Federer looks borderline disgusted as Federer flaps an easy volley into the net to go 15-30 down.

    Stefanos Tsitsipas is unlucky as he snaps at a forehand and hoicks the ball just over the tramlines, and he's got Federer beaten with a cross-court forehand before he pushes it long.

    40-30 - and he holds as Tsitsipas pushes a drop shot return just over the baseline!

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

    Look at the spring in the step of Tsitsipas now. He's standing tall and looks fresh and bubbly.

  11. *Federer 7-6 (13-11) 6-7 (3-7) 5-7 0-1 Tsitsipas

    A forehand error from Federer gets this latest game going.

    Then it's ace, ace, ace from Tsitsipas.

    The Greek's level has been so good tonight. He holds to love first up.

  12. Federer 7-6 (13-11) 6-7 (3-7) 5-7 Tsitsipas*

    Break points:

    Federer - none from 12.

    Tsitsipas - one from three.

    The Greek will serve first.

  13. Mark Woodforde
    17-time Grand Slam doubles champion on BBC Radio 5 live sports extra

    That's a crushing blow for Federer and Tsitsipas is now favourite to win this match.

    The balance has swung firmly to the Greek.

  14. Game and third set - Tsitsipas

    Federer 7-6 (13-11) 6-7 (3-7) 5-7 Tsitsipas

    Stefanos Tsitsipas is a set away from beating Roger Federer!

    TsitsipasReuters

  15. *Federer 7-6 (13-11) 6-7 (3-7) 5-6 Tsitsipas

    Oh! A brutal forehand from Tsitsipas surprises Federer up at the net, and the defending champion nets for 15-15.

    An overworked forehand from Federer flies out of bounds and then a whip down the line is called out!

    Federer challenges - and it is out! Two set points to Tsitsipas.

  16. *Federer 7-6 (13-11) 6-7 (3-7) 5-6 Tsitsipas

    Stefanos Tsitsipas is making Roger Federer wait for him.

  17. Mark Woodforde
    17-time Grand Slam doubles champion on BBC Radio 5 live sports extra

    It's mind-blowing that no-one has blinked in this match. You'd expect Tsitsipas would show some frailty but he's just shown strength.

  18. *Federer 7-6 (13-11) 6-7 (3-7) 5-6 Tsitsipas

    Federer shouts something that it's too early for me to repeat as he makes a mess of another forehand for 15-0.

    In fact, it's four misses in a row on the forehand for Federer, and he's going to serve to try and force a tie break.

  19. Federer 7-6 (13-11) 6-7 (3-7) 5-5 Tsitsipas*

    Roger Federer holds to love.

    This is going to a tie-break, isn't it?

  20. Russell Fuller
    BBC tennis correspondent at Melbourne Park

    This feels like the calm before the next tie-break.

    Tsitsipas and FedererReuters