The big hitters from the tennis circuit battle it out at The O2 in the Barclays ATP World Tour Finals. The tournament is the thrilling climax to a year of bitterly fought tournaments all over the world, with the top players competing to be the ultimate champion. Marking the end of the 2014 season, it sees the worlds best eight players (in singles and doubles) fight for the final title of the year. To reach the finals, the players must collect enough Emirates ATP Ranking Points throughout the 2014 season. Playing a round robin format at The O2, the participants each play three matches to reach the semi-finals and beyond. If the form of the players early on in the season is anything to go by, then its a safe bet that the likes of Andy Murray, Rafael Nadal, Novak Djokovic and Roger Federer will be on the court trying to win the $1.92 million prize.