Former Wimbledon champion Marion Bartoli says she can "still compete with the best in the world" as she prepares to return to the WTA tour.
Bartoli, who retired from tennis in 2013, announced on Tuesday that she would be making a comeback.
The Frenchwoman says she will not play events until she is "fully ready" but "can't wait" to return.
"I think at 33 you can still perform on the tennis court for quite some time," Bartoli told BBC World.
"I think Serena and Venus Williams are the perfect example.
"Venus has been able to play two Grand Slam finals this year, Serena is coming back next year and I think they both say they want to play up until the Olympics in Tokyo in 2020 so I think I'm definitely not too old for that.