Current No. 1 Rafael Nadal ensured he will finish the year on top by winning his first two round robin matches at the World Tour Finals in London. He accomplished the same feat in 2008 and 2010, but has never finished the year on top in consecutive years. Can he defy the odds in 2014?
Here is a look back at the players who finished the season at No. 1 over the last ten years:
2013 - Rafael Nadal (ESP)
2012 - Novak Djokovic (SRB)
2011 - Novak Djokovic (SRB)
2010 - Rafael Nadal (ESP)
2009 - Roger Federer (SUI)
2008 - Rafael Nadal (ESP)
2007 - Roger Federer (SUI)
2006 - Roger Federer (SUI)
2005 - Roger Federer (SUI)
2004 - Roger Federer (SUI)