'I don't see a reason to change, unless there is somebody else, a city that really wants it badly and is willing to come in and really support the Tour in a major way for many years to come.
The 31-year-old faces John Isner, who is ranked tenth in the world.
The Spaniard has not played since he pulled out midway though his semifinal match against Juan Martin del Potro at the US Open in September due to a knee injury.
Anderson cut a dignified and relaxed figure as he met the media at Friday's pre-tournament media day.
"But that's never a given because best-of-three-set matches indoors, the margins are slimmer and it can slip fast".
"I've played well since 2011 even though I didn't end up winning the World Tour Finals any more but I feel like I've done well and it doesn't feel like it's that long ago".
The world No 3 has won four titles this year, including a second consecutive Australian Open, and stands on 99 career singles titles - second only to retired American Jimmy Connors, who amassed 109.
Djokovic and Vajda split in April 2017, then just one year after, before the clay-court season, they started working together again and had success.
"It's extra special this season because of the whole journey I've been through the past 15 months, particularly the last eight months, after surgery in February". I just feel this is a great leverage and opportunity to promote tennis all around the world. I just feel 10 years in one place is a bit too much.
"It turned to out to be a ideal five months of the year, with two Grand Slam titles", he added.
Former champion Andy Murray, still making his way back from injury, and defending champion Grigor Dimitrov are other star names missing. For the first couple of months after comeback, I didn't have sharp feelings as before. He's had an incredible second half to the year.
The Swiss has won two of his record six titles at the event at London's O2 Arena where the ATP's prestigious season-ender has been playing to packed crowds since 2009.