Serena Williams Ends the Year as the World's Number 1

Serena Williams will end the year as the number one female player in the world after a campaign which saw her  win two Grand Slams.

The 32-year-old tennis player has lost just four matches this year, winning nine titles, including the French and US Open.

It is the third time she has topped the rankings at the end of a calendar year.

Williams became the oldest player to hold the number one position when, aged 31, the 17-time Grand Slam winner replaced Victoria Azarenka in February.

Serena Williams wins 5th US Open title

World number one Serena Williams won her fifth US Open title in a thrilling final against Victoria Azarenka at Flushing Meadows.

The American, 31, overcame a determined opponent and a testing wind to win 7-5 6-7 (6-8) 6-1 and repeat last year's final victory against the Belarusian.