Hello and welcome to the first of the women's quarter-finals between world number four Agnieszka Radwanska and sixth seed Li Na

That makes it three quarter-finals and three loses for Radwanska at the Australian Open. Li, meanwhile, is through to her third semi-final in Melbourne where she will face the winner between Maria Sharapova and Ekatrina Makarova

RADWANSKA 5-7 3-6 - GAME, SET & MATCH! A tight game from Li as Radwanska earns herself two break back point. The first goes begging when the Pole puts a backhand just marginally long of the baseline and so does the second when the Chinese hits through the ball much more cleanly. A backhand long down the line from the Pole hands Li a first match point. And one is all it takes, Radwanska sending another backhand long.

RADWANSKA 5-7 3-5 - Radwanska wafts her racquet at backhand volley, somehow cajouling it over the net for a winner. And she goes on to hold with a cross court backhand winner that at least forces Li to serve out the match

RADWANSKA 5-7 2-5 - Li batters another backhand winner down the line to bring up three game points. She puts her next backhand into the net to hand Radwanska a point but the Chinese does go on to hold with a cross court forehand that the Pole can only hit into the net. Radwanska, who has been broken in each of her last two service games, will have to serve to stay in the match after the change of ends...

RADWANSKA 5-7 2-4 - BREAK! This is the best of Li Na now as she produces a forehand winner down the line followed by a forehand drive volley winner across court to bring up three more break points. Too easy for Li as she crunches a backhand return of serve winner down the line to secure the break and take her fourth consecutive game in this set

The first set in this match was the first set that Radwanska has dropped in 2013, by the way, the Pole winning both of her titles, in Auckland and in Sydney, without dropping a set. She has also won each of her first four matches in Melbourne without dropping a set.

RADWANSKA 5-7 2-3 - Radwanska sends an off-balance forehand just marginally long of the baseline to hand Li a point to hold and go ahead for the first time in this set. And Li takes full advantage, keeping Radwanska pinned deep on the baseline and waiting until the Pole hits a low forehand into the net

RADWANSKA 5-7 2-2 - BREAK! Lovely speed up to the net from Li as she rattles off a backhand winner down the line to bring up two break back points. Radwanska concedes on the first though, sending her inside-out cross court forehand long of the baseline

RADWANSKA 5-7 2-1 - Better from Li as she makes a couple of trips into the net and comes away with volley winners on both occasions. She is off the mark in this second set, albeit still a break down

RADWANSKA 5-7 2-0 - A blistering start to this second set from Radwanska as she brings up three game points with a stunning, angled cross court forehand drop shot winner across court. And she quickly wraps up the hold that cements the break. Li has yet to win a point in this set

RADWANSKA 5-7 1-0 - BREAK! Not a great start to the second set from Li as she throws in a series of poor points to hand Radwanska three early break points. But only one is needed by the Pole as she breaks to love when Li sends a forehand long

That first set took 66 minutes, which is longer than pretty much any of Maria Sharapova's matches so far in this tournament. Sharapova takes on Ekaterina Makarova later on to decide who faces the winner of this clash.

RADWANSKA 5-7 - SET! Absolutely outstanding defence from Radwanska extends the point to another 25-plus stroke rally. But in the end, despite Radwanska guessing the right direction on a Li smash, the Chinese does seal the set when even the Pole's defence finally breaks down with an off-balance backhand into the net

Radwanska does just enough with a high backhand volley that Li can only send her cross corut forehand wide into the tramlines. That would have brought up a set point for Li. Still, she doesn't have to wait long, a sliced forehand drop shot from Radwanska being duly punished for a winner down the line. Radwanska saves it with a brilliant point, marching into the net and finding a foehand volley winner. But she puts a backhand volley on the next point to give Li a second chance...

RADWANSKA 5-6 - Li produces a magnificent cross court backhand winner on an acute angle to bring up a game point to hold. But Radwanska quickly levels up with an equally good backhand approach shot down the line. But Li steadies the ship to hold and Radwanska, having only served for the set a couple of games ago, will now have to serve to stay in it

RADWANSKA 5-5 - BREAK! Much, much better again from Li as she sets up three break back points with a very smooth cross court forehand passing shot winner. And just like Radwanska before her, Li secures the break at the first attempt, landing a great backhand return right on to the baseline

RADWANSKA 5-4 - BREAK! Whether or not the sun making an appearance put Li off her service rhythm or not, Radwanska puts in a masterful game and earns herself three more break points with a dipping backhand passing shot that Li can only volley back into the net. Radwanska breaks on the first one though, the longest rally of the match (26 strokes) ending with a forehand into the net from Li after huge pressure from the Pole

RADWANSKA 4-4 - A brilliant sliced backhand drop from Radwanska followed by an absolutely sublime backhand lob across court that goes for a winner, helps the Pole on her way to a three game points. But she only needs the one, firing an ace down the centre of the court to seal it

RADWANSKA 3-4 - Much better from Li as she holds for the first time since the opening game of the match. The Chinese sixth seed has four forehand winners to her name compared with none from Radwanska and it is again a forehand that makes the difference in that game, a winner down the line (after she had run round the ball) bringing up the game point for Li

RADWANSKA 3-3 - BREAK! Two more uncharacteristic errors from Radwanska allow Li to level at 30-30 and she quickly (in so much as anything is quick in this match) converts that to a break back point with a forehand winner off a shorter ball. And once again she does break, another cross court forehand winner doing the trick. It's back on serve again