John Isner eyes ATP World Tour Finals place

John Isner returns a shot to Milos Raonic of Canada during the Western & Southern Open on August 15, 2013
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John Isner refuses to accept that he is too far behind in the rankings to qualify for the ATP World Tour Finals.

American John Isner has revealed that he has not given up hope of turning out in the ATP World Tour Finals later this year.

With the top eight players in the world handed a place in the tournament at London's O2 Arena, Isner, who is currently ranked 13th, has significant ground to make up.

However, with two ATP World Tour Masters 1000 tournaments still to play, the 28-year-old has refused to throw in the towel.

"I certainly believe in myself and it would be an unbelievable experience to make that tournament," he told the ATP's official website. "I'm aware of the situation a little bit. The guys that are just ahead of me are actually quite a bit ahead of me as far as points go.

"I do have tournaments and time to try to make that up. I would absolutely love to go there. I've never been there before. So, for me, I've just got to focus and control what I can control. It's a cliche, but take it each match at a time and see if I can put together some good results like I did this summer."

Isner suffered from a number of injuries during the first half of the year, but he has since recovered to string together a handful of positive results on the hard courts.

John Isner celebrates his win over Novak Djokovic during the Western & Southern Open on August 16, 2013
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ATP RankingsPoints
1Scotland flag Andy Murray7,750
2Spain Rafael Nadal7,555
3Switzerland Roger Federer7,145
4Switzerland Stanislas Wawrinka5,780
5Serbia Novak Djokovic5,325
6Croatia Marin Cilic5,155
7Alexander Zverev4,470
8Austria Dominic Thiem4,030
9Japan Kei Nishikori3,285
10Canada Milos Raonic3,230
11Bulgaria Grigor Dimitrov3,070
12France Jo-Wilfried Tsonga2,770
13Belgium David Goffin2,560
14Spain Roberto Bautista Agut2,425
15Czech Republic Tomas Berdych2,390
16United States Jack Sock2,335
17Pablo Carreno Busta2,305
18Lucas Pouille2,220
19United States John Isner2,110
20United States Sam Querrey2,060