Nabisco Masters
| ATP World Tour Finals | |
|---|---|
 |
|
| Tournament information | |
| Founded | 1970 |
| Location | London United Kingdom (2009–2018) |
| Venue | The O2 Arena |
| Category | World Tour Finals |
| Surface | Hard / indoors |
| Draw | 8S / 8D |
| Prize money | US$7,500,000 |
| Website | barclaysatpworldtourfinals.com |
| Current champions | |
| Men's singles |
 Andy Murray
|
| Men's doubles |
 Henri Kontinen John Peers
|
The ATP World Tour Finals (also known as the Barclays ATP World Tour Finals for sponsorship reasons) is the second highest tier of men's tennis tournament after the four Grand Slam tournaments.
It is held annually in November at the O2 Arena in London, United Kingdom. The ATP World Tour Finals are the season-ending championships of the Association of Tennis Professionals (ATP) World Tour, featuring the top eight singles players and doubles teams of the ATP Rankings. The tournament was first held in 1970.
Roger Federer holds the record for the most singles titles, with six,while Peter Fleming and John McEnroe hold record with 7 titles in doubles.
In the current tournament, winners are awarded up to 1500 rankings points; with each round-robin loss, 200 points are deducted from that amount.
The event is the fourth evolution of a championship which began in 1970. It was originally known as the Masters Grand Prix and was part of the Grand Prix Tennis Circuit. It was organised by the International Lawn Tennis Federation (ILTF) ITF. It ran alongside the competing WCT Finals the other season ending championships for the rival World Championship Tennis Tour. The Masters was a year-end showpiece event between the best players on the men's tour, but did not count for any world ranking points.
In 1990, the Association of Tennis Professionals (ATP) took over the running of the men's tour and replaced the Masters with the ATP Tour World Championship. World ranking points were now at stake, with an undefeated champion earning the same number of points they would for winning one of the four Grand Slam events. The ITF, who continued to run the Grand Slam tournaments, created a rival year-end event known as the Grand Slam Cup, which was contested by the 16 players with the best records in Grand Slam competitions that year.
In December 1999, the ATP and ITF agreed to discontinue the two separate events and create a new jointly-owned event called the Tennis Masters Cup. As with the Masters Grand Prix and the ATP Tour World Championships, the Tennis Masters Cup was contested by eight players. However, player who is ranked number eight in the ATP Champion's Race world rankings does not have a guaranteed spot. If a player who wins one of the year's Grand Slam events finishes the year ranked outside the top eight but still within the top 20, he is included in the Tennis Masters Cup instead of the eighth-ranked player. If two players outside the top eight win Grand Slam events, the higher placed player in the world rankings takes the final spot in the Tennis Masters Cup.
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