MELBOURNE, Australia -- Mike and Bob Bryan have one more Olympic Games left in them at Rio de Janeiro in 2016 and then they plan to finally stop playing. And maybe relax.

The Bryan brothers have little left to accomplish on the tennis court. They've won 12 Grand Slam 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 said. "And then we'll sail off into the sunset."  
"Maybe just stay in Rio for the rest of our lives," Bob chimed in. "Check into a motel on the beach and drink some margaritas."  
The Bryans stayed on track for a possible 13th Grand Slam doubles title by beating Daniele Bracciali and Lukas Dlouhy 6-3, 7-5 Wednesday to reach the semifinals of the Australian Open.  
They next face the Italian team of Simone Bolelli and Fabio Fognini for a chance to reach their fifth straight Australian Open final.  
"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."