Bob and Mike Bryan, who finished as year-end No. 1's for 10 of the last 12 seasons, lost the top spot this year after falling to Jean-Julien Roger and Horia Tecau in the semifinals of the ATP World Tour Finals.
The Bryans began at No.1 to start the season, but Roger and Tecau will end there.
"This year we left it wide open," Bob Bryan said. "Tecau and Rojer got us. Deservingly so, they played well in the Slams, won the Wimbledon title. Usually what we say is to be No. 1 you got to win a Slam. Credit to them, they did.
"That doesn't mean that we're going anywhere. We're going to come back next year stronger, healthier and hungrier to do this again because we know what the feeling feels like. It's a great feeling. Those guys are feeling it right now. To be truthful, we were hanging our heads in the locker room. It's not a good feeling. We'll do all we can to get back on top.”
The 37-year-old Bryans have won 16 Grand Slams and 109 doubles, but this year, they failed to win a major. However, they did win six titles including three ATP World Tour Masters 1000 in Miami, Monte Carlo and Montreal.
The Bryans said that even though they're getting older, they can still get back on top, adding that they were injured a lot this season.
"We would like to next year do what we've done in the past, put up 10,000 plus points and win some big majors and make it really tough for anyone to catch us...” Bob Bryan said. "This is a year we got a little dinged up. Earlier in our careers, even last year at 36 years old, we were pretty lucky, injury-free. So next year we're just going to try to get stronger in the gym and not take anything for granted, take a trainer on the road, take care of our bodies a little more. In the past that was something we could take for granted because we always felt fairly sprightly."