Summary

  • Roger Federer through to final after Hyeon Chung retires with injury

  • Chung unable to carry on because of blisters

  • Federer was leading 6-1 5-2 when Chung quit

  • Federer will go for 20th Grand Slam on Sunda

  • Swiss star will face Croatia's Marin Cilic

Live Reporting

Alex Bysouth

  1. Federer 3-1 Chung*

    Two break points Roger Federer.

    Hyeon Chung is looking nervous, and with it a little sloppy right now.

    Hyeon ChungEPA

  2. Federer 3-1 Chung*

    Federer opts to attack the net for the first time, Chung eyes up his options and opts for the lob... it drops agonisingly long.

    The 21-year-old sees his Swiss senior approaching again, and pops a loose ground stroke into the net.

    He digs deep and pulls out a punchy serve to get on the board.

    Roger FedererAFP

  3. Federer 3-1 Chung*

    Roger Federer glides across the Rod Laver Arena court in his salmon sneakers before whipping a forehand from one corner to the other to follow up an opening ace.

    Beautiful.

    Chung goes long with a flat forehand, and Federer wraps this service game up in speedy fashion.

  4. David Law
    Radio 5 live sports extra commentator at Melbourne Park

    Chung is such an interesting character.

    He's new, young, and he's fearless. He's a way better player than I thought he was.

    A lot of people were saying 'this guy from Korea is such a good player' and I didn't see what the fuss was about.

    Hyeon ChungGetty Images

  5. Mark Woodforde
    Australian 12-time Grand Slam doubles champion on BBC Radio 5 live sports extra

    You wonder what Chung must have started to feel like when he was told the roof was going to be closed. Without the elements, Roger is supreme. You just wait for the first serve to start lifting.

  6. *Federer 2-1 Chung

    Chung is getting into the groove. Another powerful serve that's too hot for the ice cold Swiss to handle.

    And the Korean holds.

    Hyeon ChungReuters

  7. Federer 2-0 Chung*

    That's wild from Chung, dipping into a backhand and framing it Sydney-bound.

    Roger Federer responds with an off-target forehand of his own, pulling it into the tramlines.

    The Swiss pops a fiery serve return into the net, and Chung leads 30-15.

  8. Rain halts Briton's fightback

    Piers Newbery
    BBC Sport at Melbourne Park

    I can confirm it is absolutely hosing it down around Melbourne Park right now, with British junior Aidan McHugh involved in one of the two matches suspended because of the rain. The 17-year-old Scot, mentored by Andy Murray, was fighting back against Taipei's Chun Hsin Tseng, 3-6 2-4 when the heavens opened.

  9. Mark Woodforde
    Australian 12-time Grand Slam doubles champion on BBC Radio 5 live sports extra

    What's my favourite Chung shot? It might be the wide-range forehand. He does the splits. It's such an effort to get the right leg behind the ball.

    Hyeon ChungGetty Images

  10. Federer holds

    Federer 2-0 Chung*

    The first little "come on" of the match from Roger Federer as he scrambles to deuce, with Hyeon Chung overcooking a sweeping forehand.

    Chung slices deep and then darts into the net, but Federer's passing backhand catches the tape and sails beyond the Korean. That's unlucky.

    Federer follows up with a powerful forehand winner to hold.

  11. *Federer 1-0 Chung

    Chung catches the line with a deep forehand that's called long, only to be overruled.

    Federer leaps into a forehand, but drags it wide and that's a chance to break for Chung.

  12. *Federer 1-0 Chung

    Hyeon Chung just needs to hang on in there, he fires a punchy return that Roger Federer powers into the guts of the net and then fizzes a superb forehand winner down the line.

    That's the ticket. Deuce.

  13. *Federer 1-0 Chung

    Roger Federer's serve seems to get better with age.

    The number two seed goes 30-15 up with a wonderfully-placed ace, and then thinks he's added another... he challenges.

    Wow. It just kisses the white of the line. That's good.

    Roger FedererAFP

  14. Mark Woodforde
    Australian 12-time Grand Slam doubles champion on BBC Radio 5 live sports extra

    It's set the tone immediately.

    It's interesting that Federer tried to lift the power and pace of the return and it didn't push Chung back from the baseline, it was the subsequent shots that stalled him.

  15. Federer breaks

    *Federer 1-0 Chung

    Well, you don't get three in a row...

    A slice to Federer's forehand is returned with interest and Chung pays the price.

    Break point to the Swiss, and this is one he takes.

  16. Federer 0-0 Chung*

    And Chung claws back to deuce, another uncharacteristic net cracker from Roger Federer.

    Two mistakes in a row from the defending champion.

    Hyeon ChungEPA

  17. Federer 0-0 Chung*

    Chung rattles the tape off his first serve, the second is coaxed back by Federer.

    Tentative from both players, but Chung is patient and sends his ground strokes deep and it's Federer who is drawn into the error.

    First break point saved.

  18. Mark Woodforde
    Australian 12-time Grand Slam doubles champion on BBC Radio 5 live sports extra

    Federer can't think of the title yet. It's not going to be a pushover as he goes for number 20.

    Roger FedererGetty Images

  19. Federer 0-0 Chung*

    And that's two early break points for Roger Federer...

  20. Federer 0-0 Chung*

    Roger Federer gets the first point of this Australian Open semi-final on the board.

    But Hyeon Chung shows he can glide around the court just as gracefully as the Swiss, and forces the man 15 years his senior to go long.

    Chung pops a relatively straightforward beyond the baseline - 15- 30 - nerves from the young Korean?