Tennis World number one Serena Williams has decided to end her season early, choosing not to defend the WTA Finals title. Her last match was her shock loss to Italy's Roberta Vinci in the semi-finals of the U.S. Open last month. It ended her bid to become the first women in 27 years to win all four grand slam titles in the same season.

Farhan fires Pakistan to 32-run win over US in T20 World Cup
Australia's Bolton airlifted to hospital with broken neck
New Zealand openers smash T20 World Cup record in rout of UAE
Draw means Al-Hilal drop first points in Asian Champions League
Ski great Vonn needs multiple surgeries for complex leg fracture
