Serena wins Sony Ericsson Championship Title!

Serena Williams won her second career WTA Championship title on Sunday with a commanding 6-2 7-6(7-4) victory over sister Venus, a triumph which earned her a cool $US1.55 million. It was Serena's fourth straight win over her sister this year and leads their head to head 13-10. This is Serena's second season-ending trophy to add to her 2001 success and this win made her just the second player after Justine Henin in 2007 to win two Grand Slam titles as well as the WTA Championship in the same year.

World number one Serena won all five matches at this event, including a group stage win over Venus and such was her dominance in the final that she gave up just seven points on serve. The 85-minute win was Serena's 13th victory in 23 meetings with her sister, a family rivalry stretching back to 1998. In a symbol of this injury-hit, desert money-spinner, which had seen four players end their campaigns prematurely through various aches and pains, both sisters arrived on court nursing knocks. Serena had her left thigh heavily-strapped while Venus had protection on her left knee, treated several times during her gruelling semi-final win over Jelena Jankovic.

But Serena, with four wins from four matches here, was the fresher of the two in the first set, a legacy of having spent three and a half hours less than her sister in reaching this stage. Breaks in the third and seventh games gave the new world number one the opening set. Serve dominated the second set before Serena stretched to a 5-2 lead in the tie-breaker. An ace set up match point and the title was secured with a crunching forehand winner. Talk about serving: Serena held five of her last seven service games at love and lost just one point in each of the other two. Serena won an incredible 87 per cent of her points behind her serve.

This was Serena's third tournament win of the season after Wimbledon and the Australian Open. "I haven't won a tournament that wasn't a Grand Slam in a while, so that was even more exciting," she said. "My losing streak in [other] tournaments is over."