Djokovic 'not concerned' about finishing No.1 ahead of Nadal

Serbian tennis player Novak Djokovic has insisted that he is not concerned about winning the race to finish 2013 above Rafael Nadal at the top of the world rankings.

According to Sport24, Djokovic goes into the season-ending ATP World Tour Finals at London's O2 Arena still in with a chance of snatching pole position from current world number one Nadal.

When Nadal beat Djokovic to win the US Open, it seemed the Spaniard was certain to take top spot at the end of the year, the report said.

However, the world number two has won all of his 17 matches since New York, with his third straight title coming on Sunday at the Paris Masters, and he still has a slim chance of overtaking Nadal depending on their results in London this week, the report added.

For that to happen, the Serb must retain the Tour Finals title he won for the second time last year and then gain maximum points in the Davis Cup final against the Czech Republic, while Nadal would have to fail to win two of his three group matches in London, the report further said.

Djokovic said that it does not make sense for him to get into the number one calculations, adding that what is important for him is to know that he has won three tournaments in a row and that gives him a lot of confidence coming into this week.

After winning the Australian Open in January, Djokovic has suffered painful defeats in the semi-finals of the French Open and the Wimbledon and US Open finals, according to the report.