The Lions achieved an unforgettable triumph over the Wallabies with Saturday's 41-16 victory in Sydney to take the series 2-1.
While Saturday's win is still fresh in the memory, fly-half Sexton is already plotting the All Blacks' downfall in four years' time.
Speaking at Dublin Airport, Sexton said: "A lot of the same guys will be there (New Zealand) if they can keep form and keep playing well for their clubs and countries so already guys are starting to talk about four years' time.
"It's such a special thing to be a part of so I'm looking forward to having a little break and then big times ahead for me."
- Sports & Recreation