Eight years into its stint at the O2 Arena, change is in the air at the ATP World Tour Finals.
Andy Murray and Novak Djokovic, who have qualified every year, are still here but the rest of the London cast list is less familiar.
For starters, there is no Roger Federer at the season-ending tournament for the first time since 2001, the six-time champion having cut short an injury-plagued season after Wimbledon.
Rafael Nadal qualified but opted against competing in Greenwich as he attempts to fully heal a wrist injury that has bothered him since May.
Instead, joining Djokovic and Murray are Stan Wawrinka, Milos Raonic, Kei Nishikori, Gael Monfils, Marin Cilic and Dominic Thiem.
Monfils and Thiem are debutants, while the others boast just seven previous appearances between them.
Aside from Djokovic, who is bidding to tie Federer's record of six titles, none of the other players have ever made the final and only two are in their 30s.
The tussle between Murray and Djokovic for world number one will undoubtedly be the dominant narrative but behind them the battle is on for the places at tennis' top table vacated - whether permanently or not remains to be seen - by Federer and Nadal.
Wawrinka certainly deserves to be placed apart from the pack given his three grand slam titles, the latest of which came at the US Open in September.
But the Swiss remains maddeningly inconsistent and feels far adrift from Djokovic and Murray.
"I'm very far from being number one," said the third seed. "If you look at their records, they're playing in the final of every tournament they play.
"But three grand slams in three years is something that I didn't expect. I'm very happy with where I am now."
Fourth seed Raonic reached his first grand slam final at Wimbledon this year, losing to Murray.
The Canadian is relieved simply to be in London after being forced to pull out ahead of a semi-final against Murray in Paris last week - sealing the number one spot for the Scot in the process - with a thigh injury.
At that stage he looked very doubtful for his opening match against Monfils on Sunday.
The 25-year-old said: "I flew back to Canada for 12 hours to get some treatment. I was told three to five weeks but I've made constant progress. I'll definitely be able to play the first match."
The presence of Monfils, one of the sport's great entertainers, is a real boost to the tournament in the absence of Federer and Nadal.
At 30, the Frenchman is the oldest debutant since 1972, while 23-year-old Thiem is one of the youngest in recent years.
The draw certainly looks to have favoured Djokovic over Murray as he bids to rediscover his form of the first half of the year.
The Serbian has never lost to Raonic, Monfils or Thiem, holding a collective 23-0 record against his rivals in Ivan Lendl Group.
But the trio can take heart from Cilic, who was 0-14 against Djokovic heading into their quarter-final in Paris last week but pulled off the victory.
Cilic joins Murray, Wawrinka and Nishikori in John McEnroe group and might just be the biggest danger to Murray and his number one ambitions.
The Croatian, who will lead his country in the Davis Cup final in a fortnight, said: " With Novak, when I played him, obviously coming into the matches, there was always some uncertainty that was present.
"Having this victory at quite a critical moment, it just shows that I found a good way to play against him. It is something that I think can help me in the future."
Source: PA
