Hello and welcome to LIVE coverage of the first of the women's quarter-finals between world number four Agnieszka Radwanska and world number five Sara Errani.

So it is world number five Sara Errani who is through to the semi-finals where she will face either world number one Serena Williams or former champion Svetlana Kuznetsova.

RADWANSKA 4-6 6-7(6) - GAME, SET & MATCH! This time Errani does book her place in the semi-finals, Radwanska going just wide down the with a forehand after backing away from the ball.

RADWANSKA 4-6 6-6 (6-7) - TIE-BREAK! A forehand long down the centre of the court hands Errani a second match point...

RADWANSKA 4-6 6-6 (6-6) - TIE-BREAK! Radwanska holds on, keeping Errani pushed back during a 27-stroke rally and eventually drawing the forehand into the net from the Italian. All square again at the second change of ends.

RADWANSKA 4-6 6-6 (5-6) - TIE-BREAK! Errani goes long with a backhand lob to allow Radwanska to level at 4-4 before also putting a backhand volley lob attempt lob to see the Pole sneak ahead. But she levels with a backhand lov winner before earning herself a match point when Radwanska goes wide with a forehand down the line...

RADWANSKA 4-6 6-6 (3-3) - TIE-BREAK! All square at the change of ends as Radwanska opens up a mini gap with a forehand drop shot and lob winner combo before Errani levels up with a series of brutal ground-strokes, eventually doing enough to find a smash winner.

RADWANSKA 4-6 6-6 - No signs of nerve from Errani this time around as she holds for the loss of just one point to force the tie-break to decide this second set, and possibly the match.

RADWANSKA 4-6 6-5 - Radwanska holds to 30 to go ahead once more in this second set, the Pole only just missed her first game point chance when she went only slightly long with a forehand after racing up to the net for a drop shot and then chasing back for a lob. But she holds at the second attempt and Errani will have to serve to stay in the set after the chance of ends.

RADWANSKA 4-6 5-5 - BREAK! A nervy game from Errani as Radwanska breaks back to love to level this match once again. A great game from the Pole as she leaps all over the slower Errani serve and seals the break with a forehand winner.

RADWANSKA 4-6 4-5 - BREAK! Errani finds a cross court backhand winner to level at deuce and then another backhand winner to bring up a break back and sure enough the Italian does break for the lead once more to leave herself serving for the match.

RADWANSKA 4-6 4-4 - BREAK! Radwanska is immediately back in this match, breaking back without too much trouble when she wears Errani down from the baseline this time. That's what Radwanska does best but she has struggled today against tehe Italian.

RADWANSKA 4-6 3-4 - BREAK! Ouch! Radwanska dumps a backhand into the net to hand Errani two more break points. And the Italian gets the break at the first attempt with another brutal rally which ends when Errani draws a backhand into the net from Radwanska. Errani is potentially just two games away from a second successive French Open semi-final.

RADWANSKA 4-6 3-3 - Radwanska easily gets up the court to fire a forehand passing shot winner down the line to deny Errani on the first of game points. But the Italian does hold to level up this set fully with a mis-hit that completely befuddles Radwanska.

RADWANSKA 4-6 3-2 - BREAK! A double fault from Radwanska hands Errani two immediate break back points. A forehand winner down the line saves the first but she goes wide on the second to hand Errani the break back and really allow the Italian back into this second set.

RADWANSKA 4-6 3-1 - BREAK! Radwanska breaks for a second consecutive time, this time to move ahead, an angled cross court forehand proving too powerful for Errani, who can barely even get her response to the net let alone over it.

RADWANSKA 4-6 2-1 - Radwanska is forced to recover from 0-30 down on serve before being able to hold to 30 with a blistering backhand winner down the line, the Pole requiring all her core strength to change the direction of the rally and just keep the ball down and get it to catch the outside of the line.

RADWANSKA 4-6 1-1 - BREAK! Radwanska gets up to the net after an aggressive forehand return of serve and puts down a smash winner to earn herself a break back point. Errani saves it though before a horrible forehand well long to hand the Italian a game point. Radwanska denies her on that though with a solid rally that ends when Errani nets a forehand. Errani squanders a number of game points through and Radwanska breaks back at the second attempt with a forehand winner. Back on serve.

RADWANSKA 4-6 0-1 - BREAK! Errani takes the first point of the second set with another sensational sliced forehand drop shot winner before also dragging Radwanska up to the net on the second and firing a passing shot winner over the net. A low backhand into the net from Aga then hands Errani three early break points in this second set. And the Italian does break on the first when Radwanska slaps down a double fault.

RADWANSKA 4-6 - SET! Errani counters a Radwanska forehand drop shot with one of her own, the Italian's going for a winner, on her way to bringing up two set points. Only one is needed for Errani though as Radwanska sends a forehand long to end another lengthy rally. The Pole is going to have to come from a set down if she is to reach her first French Open semi-final. Fantastic play from Errani.

RADWANSKA 4-5 - A great hold from Radwanska. She opens with a tricky smash winner inside out and across court before a backhand winner down the line brings up three game points. She only needs the one though, thumping an ace down out wide to leave the Italian to serve out the set after the change of ends.