I saw bits of the Azarenka / Radwanska & Sharapova / Arruabarrena matches.
I am still surprised at the contradiction in Sharapova. To look at, elegant, poised, majestic. Then the shrieking. The mute was activated post haste. Once she found momentum, the arising onslaught demolished her opponent, making the effort put up in the first set, a distant memory.
Azarenka seems on course too. I'm pleased Errani & Stosur are still in the mix.WTA Singles - Fourth Round 12.03.13
 V Azarenka (BLR) d U Radwanska (POL) 63 61
 M Sharapova (RUS) d L Arruabarrena-Vecino (ESP) 75 60
 M Kirilenko (RUS) d  A Radwanska (POL) 61 46 75
 A Kerber (GER) d [Q] G Muguruza (ESP) 64 75
 P Kvitova (CZE) d  K Zakopalova (CZE) 62 63
 S Errani (ITA) d  M Bartoli (FRA) 63 62
 S Stosur (AUS) d  M Barthel (GER) 46 62 63
 C Wozniacki (DEN) d  N Petrova (RUS) 76(3) 63WTA Doubles - Quarterfinals
 E Makarova (RUS) / E Vesnina (RUS) d H Chan (TPE) / J Husarova (SVK) 76(3) 46 10-7
K Date-Krumm (JPN) / C Dellacqua (AUS) d V Dushevina (RUS) / A Panova (RUS) 62 64tage!