Rafael Nadal will finish the year at the top of the ATP World Rankings following his victory over Stanislas Wawrinka at the Tour Finals at London’s O2 Arena yesterday afternoon.

The 27-year-old overcame his Swiss opponent with the two set victory that he required in order to obtain enough points to guarantee ending the 2013 as the world number one.

Despite needing two tiebreaks, the Spaniard came through in straight sets, defeating his opponent 7-6 (7-5), 7-6 (8-6) and securing his place in the semi-finals of the annual season finale.

Nadal now has 12,030 points to his name at the summit of the world rankings, but has competed in two tournaments more than his closest challenger Novak Djokovic who has obtained 10,610 points from 17 events so far this year.

The Serb also only has one major honour to his name having won the Australian Open at the start of the season, while Nadal has claimed the French and US Open titles.

Andy Murray took the honours at Wimbledon but was ruled out of the ATP Finals through injury, meaning that the tournament is likely to be contested by Nadal and Djokovic.

Roger Federer is an outside bet to win the competition but was beaten 6-4, 6-7 (2-7), 6-2 by Djokovic in his first group match.

Nadal overcame David Ferrer in his opening match at the O2 Arena, and he will be hoping that he can change his fortunes in the end of season tournament.

The Spaniard has never won the event before, coming closest in 2010 when Federer beat him in the final.

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