The Bryan brothers have little left to accomplish on the tennis court. They've won 12 Grand Slam doubles titles, finished No. 1 for eight of the past 10 years and competed in three Olympic Games, winning gold last year in London.
But the chance to defend that gold will keep them in the sport for three more years.
"I think that's where we see the finish line. We'll be 38. We'd like to maybe go out at that spot," Mike Bryan says. "And then we'll sail off into the sunset."
"Maybe just stay in Rio for the rest of our lives," Bob said. "Check into a motel on the beach and drink some margaritas."
"It's still fun. We create goals and new challenges each time we step out of the house in January," Mike Bryan says. "The goal is to finish No. 1. That's it. That's really what we play for."
Information from The Associated Press was used in this report.