"It's really only Novak who can say "If I play as well as I have the last three months then maybe I can win the ATP Finals as well", the Swiss, who begins in Lleyton Hewitt group against Japan's Kei Nishikori on Sunday, told reporters.
But world number one Djokovic, who has won the event five times - four times in London - said he was in favour of moving the tournament around to promote the sport.
"I'm extraordinarily happy to have won 99 (titles) - I'm happy I won the amount of matches and tournaments this year to get me there". Chang's calm aura in Nishikori's players box and only visibly being animated when deeming it necessary, along with his coaching expertise to encourage Nishikori to be more offensive when the opportunity presented itself took him to new heights.
Djokovic looks the man most likely to deny Federer a 100th Tour title, having resumed the dominance he displayed in 2011, 2015 and 2016. John Isner will replace Nadal in the ATP Finals field.
Nadal announced on Twitter that he is done for the year, citing the stomach muscle issue that forced him to withdraw from last week's Paris Masters.
"In this way I hope to be in full condition for the next season".
London has hosted the tournament since 2009 and is contracted to keep it until at least 2020, while the capital city remains one of the frontrunners to host the event beyond then. "It turned to out to be a ideal five months of the year, with two Grand Slam titles".
Isner hopes to make a similar impact to compatriot Jack Sock, who reached the semis on his debut previous year before losing to eventual champion Grigor Dimitrov. "Been pretty close throughout my career, but it never happened".
'I feel like he's very quickly played a top 30 level, ' said Federer of what he saw from Murray this summer. He's had an incredible second half to the year. "However, since the problem in the abdominal muscle also prevents me from playing in London, we take advantage of the moment to remove the free body and avoid future problems", the Spaniard explained.
Anderson is the other debutant and will become the first South African in 23 years to grace the season-ender.
Zaha only just returned from an injury for last weekend's home defeat to Chelsea last weekend, after missing the global break. That is why we were talking before about Dele Alli and Christian Eriksen and worldwide duty.
The worldwide trade secretary said on Thursday the government had "an instruction from our voters to leave the EU". I would urge caution that an imminent breakthrough is not necessarily to be taken for granted, not by a long shot.
On Friday on Twitter , Kardashian West confirmed reports that the fire has reached her and husband Kanye West's new property. Kim revealed in her Instagram stories that she had just one hour to pack up before leaving her Calabasas home.
Households in England, Scotland and Wales on default tariffs - such as standard variable tariffs - stand to benefit. Any changes to the combination terms would be created to mitigate the impact of these developments.
The investigation revealed the choice of a certain autopilot setting before take-off made it target zero feet. Flight crew say they "became visual with the ground" as the plane plummeted when autopilot was switched on.
To provide more security, the next Google Chrome update is focused on tackling these sites with shady subscription services. Google is trying to solve that by warning users of such pages in Chrome's next release - Chrome 71 .
Kawhi Leonard Returns As the Raptors Rise to 11-1
Leonard, who leads the team in scoring and rebound averages, has played in just seven of the 11 Raptors games so far. Following their matchup with the Kings, Toronto will return home to take on the New York Knicks on Saturday.
Dortmund’s keeper Buerki ruled out of Bayern clash
Goals from Marco Reus, who hit twice, and Paco Alcacer gave Dortmund a 3-2 win over the Bavarians at Signal Iduna Park . Then Achraf Hakimi squared the ball for Reus, who somehow sidefooted over the bar.
Kuchar Takes Lead Over Champ In Mexico
Rickie Fowler (68) and Tony Finau (65) were at eight-under 134, along with their Ryder Cup captain, Jim Furyk , who had a 65. Kuchar, meanwhile, has more than Champ to worry about the next two rounds.
Sears in Boynton Beach to close
The number of stores had peaked in 2012 at 4,000, including its Sears Canada division that was later spun off. Sears Holdings announced Thursday that 11 K-Marts and 29 Sears locations will shut their doors in February.
Timberwolves trade Jimmy Butler to Sixers
They're currently 8-5, third place in an Eastern Conference that figures to be wide open with LeBron James now in Los Angeles. However, the Sixers reportedly made the deal with the expectation that Butler will re-sign with the franchise next Summer.
Macron praises WWI general who later collaborated with Nazis
The French president will not attend Saturday's ceremony at Les Invalides in Paris, instead sending his chief military adviser. France's leading Jewish organization, known by the initials CRIF, issued a searing criticism of Macron's stance.
Unhealthy lifestyle is more risky for women than for men
But, women are likely to experience additional symptoms such as unusual tiredness, dizziness, cold sweats, and nausea or vomiting. Doctors must ensure that women and men have equal access to health care programs addressing these conditions, researchers said.