Additionally, commitment players will no longer need to enter the 500 events 12 weeks in advance but instead go back the normal six-week entry deadline.

Nadal has qualified for the tenth consecutive time for the event, however on 24 October, he pulled out of the tournament, stating that he will undergo appendix surgery in November.

[16] On 18 August, Roger Federer qualified for a record 13th straight year after clinching his 80th career title at the Cincinnati Masters.

Federer began his clay season with a wildcard entry into the Monte-Carlo Masters, where he lost the final to his compatriot Stan Wawrinka.

Federer began his grass season in Gerry Weber Open, winning a record seventh title, this time over Alejandro Falla.

Federer then won his fifth title of the year at his home tournament Swiss Indoors Basel defeating David Goffin in straight sets.

[18] Stan Wawrinka had his best ever start to an ATP World tour season, winning the Aircel Chennai Open defeating Édouard Roger-Vasselin in straight sets in the final before going on to clinch his maiden Grand Slam trophy at the Australian Open, defeating Djokovic in a 5-set thriller in the quarterfinals, followed by a win over Nadal in the final.

He had his best ever grass court season, making the semifinals of the Queen's Club championships before reaching his first ever Wimbledon quarterfinal, losing to eventual finalist Federer in four sets.

He and countryman Federer then combined to reach the Davis Cup final for only the second time in the country's history, Wawrinka winning his singles and the doubles rubbers.

[19] Marin Čilić had a difficult start to the year, having had to serve a suspension at the back end of 2013, losing early in the event he entered in Australia, including a second round loss at the Australian Open to Gilles Simon in five sets.

After a first round loss at Aegon Championships, Čilić rebounded to make his first Grand Slam quarterfinal since 2012 at Wimbledon, and despite taking a two sets to one lead against Djokovic, he ultimately lost to the eventual champion in five.

This launched him into the top 10 for the first time since 2010, achieving a career high ranking of world number 8 in October following the Shanghai Rolex Masters.

[20] Andy Murray began the year in Qatar ExxonMobil Open, in his first tournament since returning from back surgery at the end of the previous season losing to Florian Mayer in the second round.

Murray was unsuccessful in his defence of his Wimbledon title, losing in the quarterfinals against Grigor Dimitrov, his first loss prior to the semifinals in the said event since 2008.

This is the 7th straight season Murray has qualified for the year-end championships, set to make his 6th appearance after missing 2013 due to injury.

On 31 October, Tomáš Berdych, Kei Nishikori and Milos Raonic completed the field, after all three made the semifinals in Paris.

At the BN AMRO World Tennis Tournament, Berdych ended a run of 16 months without a title, defeating Marin Čilić in the final.

Nishikori won his second title of the year in Barcelona Open Banc Sabadell, defeating Santiago Giraldo in the final in straight sets.

He made it to his first ever Masters 1000 final in Mutua Madrid Open, where he faced defending champion Nadal, winning the first set for the loss of two games before retiring in the third round with a back injury.

A foot injury caused him to withdraw from both Toronto and Cincinnati, however he had his best run at a Grand Slam event at the US Open defeating Djokovic in the semifinals to reach his first ever Major final, where ultimately he lost in straight sets to Marin Čilić.

At the Paris Masters, he reached the semifinals to cement his place at the World Tour Finals, where he is set to make his debut appearance.

Raonic made it to his first semifinal of the year, losing a tight three set battle against Novak Djokovic in Internazionali BNL d'Italia.

At the US Open, Raonic reached the fourth round for the third year in a row, losing to eventual finalist Nishikori in a tight 5-set match that lasted over 4 hours.

The Bryans then continued their good form and captured five titles in a row, winning in the Delray Beach International Tennis Championships over Čermák and Elgin, BNP Paribas Open over Peya and Soares, Sony Open Tennis over Cabal and Farah, U.S. Men's Clay Court Championships over Marrero and Verdasco, and the Monte-Carlo Rolex Masters over Dodig and Melo.

They then captured the US Open against the Spanish team of Granollers and López, extending their streak to 10 consecutive years of at least winning one Grand Slam.

They reached their second final of the year at the Dubai Tennis Championships, once again facing Bopanna and Qureshi, but this time they ended up in the losing side.

They bounced back by winning back-to-back Masters titles: the Mutua Madrid Open over Bob and Mike Bryan and the Internazionali BNL d'Italia over Haase and López.

On 29 October, after the conclusion of the second-round matches in the BNP Paribas Masters, the teams Łukasz Kubot and Robert Lindstedt, Jean-Julien Rojer and Horia Tecău, and Marcel Granollers and Marc López took the next three spots.

During the European clay season they won the Grand Prix Hassan II and BRD Năstase Țiriac Trophy over Bednarek and Dlouhý and Fyrstenberg and Matkowski, respectively.

Tecău also reached the final of the Australian Open in mixed doubles with Sania Mirza, but lost to Mladenovic and Nestor.