Highlights of the WTA Championships 2012 in Istanbul fourth day of competition. (2012-10-26)

The favourites get the job done on Day 10, with Maria Sharapova, Petra Kvitova and Andy Murray advancing to the semis.

Maria Sharapova revealed she was informed by the International Tennis Federation (ITF) few days ago that she had failed a drug at the 2016 Australian Open as she staged a surprise press-conference in Los Angeles on Monday.

Rafael Nadal reaches yet another grand slam semifinal after downing Tomas Berdych in four high-quality sets.

Roger Federer beats Andy Murray in Dubai and wins his second titel in 2012.