Hello and welcome to our live coverage of a much-anticipated semi-final showdown between two of the game's true greats - Roger Federer and Rafael Nadal. The clash is due to get underway at 8.30am UK time when we will hopefully we treated to a spectacle that is undoubtedly the highlight of Day 12 at this year's Australian Open. Are we set for a classic?

So it's Nadal versus Wawrinka in Sunday's final after Rafa makes it 23 wins in 33 meetings with Roger. The Spaniard will now be aiming to become only the third man to win each of the Slam titles twice. It would also be his 14th overall. Of course, Wawrinka will have something to say about that and will be hoping his maiden appearance in a major final will end with a fairytale success. Join us at 8.30am UK time on Sunday for live coverage.

GAME, SET & MATCH! FEDERER 6-7 (4) 3-6 3-6 NADAL: It's all over! Nadal books his place in Sunday's final with a straight sets win after breaking Fed once again on his second match point. The Swiss maestro has been made to work to hold his serve in almost every game today - and this was no exception. At 40-15 he's on cruise control but lets Rafa back in at deuce. The Swiss manages to save one match point but when a stunning winner on the run sets up the second, he buckles under pressure.

FEDERER 6-7 (4) 3-6 3-5 NADAL: At times this is just a real joy to watch. In one point you are left in awe of Rafa's raw power and accuracy. In the next it's the finesse and guile of Roger. But in the moments that count it's Nadal who is coming out on top. At 40-30 a drilled backhand from Federer sets up a simple volley at the net. Unfortunately for the Swiss, he messes up his lines and crashes it into the cord. He now needs to hold serve to stay in the match.

PHOTO: Rafa looks to his corner with delight as he moves towards another major final.

BREAK! FEDERER 6-7 (4) 3-6 3-4 NADAL: An unforced error at 30-30 gifts Nadal a chance to strike a killer blow. Federer gets his first serve in but when his approach shot off Rafa's return clips the net it spirals up into the air and just beyond the baseline. Surely now it's all over for the 17-time Grand Slam champion?

PHOTO: One of many great rallies from today's semi.

FEDERER 6-7 (4) 3-6 3-3 NADAL: In a match consisting of some magnificent tennis, this one would be left on the cutting room floor. It's as routine as you'd hope if you were Rafa. Some decent first serves see him take command and he finishes it off with thumping forehand into the corner that Fed can only deflect wide.

FEDERER 6-7 (4) 3-6 3-2 NADAL: Resilient play by Federer who shows real grit to fight off two break points to edge ahead in the third. His old favourite of a wide serve and volley sees him snatch the advantage and another strong delivery ends with Rafa blocking a return out of the court.

BREAK! FEDERER 6-7 (4) 3-6 2-2 NADAL: It looked like it was going to be over with a whimper, but suddenly there's hope for Roger as he hits straight back. Two miss-hit shots down the line by Rafa tee up a brace of break points for the Swiss. Nadal saves one but then crashes another forehand long to give the world number six a chance.

PHOTO: Rafa wins yet another key point.

BREAK! FEDERER 6-7 (4) 3-6 1-2 NADAL: It's all going wrong for Federer. The Swiss can't cope under the Nadal onslaught and the errors are creeping into his play. At 15-40 down he has a simple volley into the left channel but clips it into the net to hand Rafa the momentum in the third. This could well be over in three sets.

FEDERER 6-7 (4) 3-6 1-1 NADAL: A third ace of the match gives Nadal the impetus and he goes on to hold to 15 when Federer nets a crosscourt backhand. The Swiss needs to make Rafa work header on his serve. The final game of the second set is surely his blueprint for any hope of success.

Someone watching this with interest will be Stan Wawrinka, who awaits the winner. The Swiss number two's four-set victory over Berdych in yesterday's first semi final was a high calibre contest. Relive how he secured his maiden appearance at a Grand Slam final with our game by game breakdown.

FEDERER 6-7 (4) 3-6 1-0 NADAL: The third set gets off to the best possible start for Federer who gives himself a confidence boost with a hold to love. That's eight points without reply on his serve now. But can he make any inroads on the Rafa serve and force a break point or two? That's key if he wants to get back in this semi-final.

PHOTO: Federer looks at the floor in disappointment.

SET! FEDERER 6-7 (4) 3-6 NADAL: WOW! Rafa recovers from a difficult position to serve out the second set. From 0-30 down he wins two incredible points to level. A rasping forehand puts Fed on the defensive but he manages to return the Spaniard's overhead before clipping the next volley into the net with an attempted winner down the line. Another ridiculous rally ends with a beast of a forehand from Nadal. Fed then fires a brace of tame shots into the net to hand the world number one the set.

FEDERER 6-7 (4) 3-5 NADAL: The Swiss recovers some composure and rattles through his second love service game of the match, finishing it off with a stylish ace down the centre line. Rafa will now serve for the second set.

FEDERER 6-7 (4) 2-5 NADAL: The world number one consolidates the break to 15 but there are signs his first serve is beginning to dip. A double fault gives Fed a miniscule amount of hope at 30-15, but Nadal recovers and moves within one game of a two-set lead.

PHOTO: A dismayed Federer knows it's a long way back from here.

BREAK! FEDERER 6-7 (4) 2-4 NADAL: Rafa finally makes a deserved breakthrough. The Spaniard just kept turning the screw and for the first time Federer looks a bit rattled. An absolutely impossible pick up shot from deep with the Swiss Maestro at the net, tees up two break points and he made the last one count with a sensational forehand winner into the left corner.