Hello and welcome to the second round-robin match of the WTA Championships in Istanbul, also a Red Group clash but this time between world number one Caroline Wozniacki and eighth seed Agnieszka Radwanska.

Phew, that was exhausting even to watch. Great fight from Radwanska but Wozniacki stayed calm to open with a win. Next? Sharapova v Stosur. Whoop! And you can watch them on

WOZNIACKI 6-4 - GAME SET AND MATCH! Deuce again after a superb point is won by Wozniacki with a casual colley at the net that drops clear. But match point once more as Wozzer controls the next point... Taken but not in a great manner - poor, weak shot into the net from Radwanska.

WOZNIACKI 5-4 - Wozniacki races 30-0 up against serve but two superb deft shots from Radwanska brings the Pole level. A terrible, Zvonareva-esque mis-hit from Radwanska now and it's match point Wozniacki! Horribly long first serve... and the second sees Wozniacki start a baseline rally but, under no pressure, she nets. D'oh! Deuce. And advantage Radwanska after she gets the better of her friend from the net. Tense.

WOZNIACKI 5-4 - The Dane is in the middle of a mini-collapse as she mis-hits an overhand smash to bring it to deuce on serve. But she holds her nerve on the next rally and Radwanska goes long. Wozniacki holds in the end, to her team's relief. The Pole must serve to stay in the match.

WOZNIACKI 4-4 - Radwanska holds with a smash that Wozzer set up after being given a lot of running to do. Great fight from the Pole given the circumstances.

WOZNIACKI 4-3 - BREAK! Wozniacki showing us why she is world number one as she races 40-0 up, but a delightful lob from Radwanska catches her out at the net. She almost gets there though. And another point to the Pole, a crisp forehand across court to make it 40-30... And back to deuce after a nervy mis-hit from the Dane. Odd. And now break point, from having been 40-0, after a flat, savage forehand leaves Wozzer stumbling. And a double fault! Wozniacki cracks! From 40-0 she is broken!

WOZNIACKI 4-2 - BREAK! Couple of tasty returns from the Dane but a trademark forehand spinner from Radwanska brings her back into it. She's tiring though and Wozniacki pumps an inch-perfect forehand into the corner. Two break points... Second serve and a brilliant, diving winner from Wozniacki after Radwanska thought she had her chasing shadows.

WOZNIACKI 3-2 - Vicious forehand spinner from Radwanska to level after Wozniacki thought she was in charge of that point. But an error into the net and Wozniacki is able to pull clear to hold.

WOZNIACKI 2-2 - Poor choice of drop shot from Wozniacki as Radwanska was already moving towards its destination. The Pole holds comfortably.

WOZNIACKI 2-1 - The Dane's turn to hold to love as Radwanska throws in a few errors and a long return.

WOZNIACKI 1-1 - Radwanska is hurting but she holds to love, the penultimate short particularly fun as she passes wide of Wozzer, who nets the next point.

WOZNIACKI 1-0 - 30-0 down on serve, Wozniacki elects to start a grinding baseline rally as she aims to work Radwanska's shoulder. She wins that point but the Pole takes the next one and has two break points. Some hefty serve-volleys bring it to deuce though. Now advantage Wozzer as she attacks the net with an underarm pass off the line. Tight, as shown by hawkeye. Worth checking though. And she holds with a glorious passing shot off the tramline. Nice.

So it goes to a decider. As ever between sets I remind you that this is on the television, on Eurosport, and that you can watch streaming on the

WOZNIACKI 6-2 - SET! Double fault from Radwanska brings it to 15-15. Wozniacki unleashes some fierce returns and has two set points now! Radwanska pulls one back as she shoots from the hip and she brings it to deuce with a risky double-hander off the baseline. Yikes. Wozniacki with a good challenge off a serve that was clearly out. A rally ensues that the Dane wins as she buries a volley at the net. Set point again... Taken with a killer forehand after Radwanska thought she'd killed the smash!

A delay as Radwanska is getting re-bandaged on her dodgy shoulder....

WOZNIACKI 5-2 - Long from Radwanska as Wozniacki works the forehand nicely. The Dane holds easily to win her fourth in a row and take control of this second set.

WOZNIACKI 4-2 - BREAK! Vicious return from Wozzer gives her a break point at 30. A tight game so far with some great approach play from both... And, off second serve, Wozniacki takes her break point after spinning a return wide that Radwanska can only poke over to set up the volley - which she buries.

WOZNIACKI 3-2 - Bad mistake from Wozniacki at 30-15 as she mis-hits out. But Radwanska skews one out and Wozniacki holds with an ace.

WOZNIACKI 2-2 - BREAK BACK! Again. Not sure if this is a problem with nerve from both players or if the court is allowing better returns than usual. Either way Wozniacki pulls out some big returns and exploits some hesitant play at the net to level.

WOZNIACKI 1-2 - BREAK! Wozzer puts away a volley into the corner but Radwanska responds with a great drop to deuce. And she exploits some hesitant serving to snatch another break as this second set goes against serve.