Lance Armstrong has indicated that he will attempt to win a record-breaking seventh Tour de France next year.
But the 32-year-old, who became the only man to win six Tours in this year's race, admitted his time at the top of the sport was running out.
"There's not much time left but I could win one more Tour," the American said.
Armstrong beat nearest rival Ivan Basso by more than six minutes to easily win the 2004 Tour, surpassing the record of five wins shared by four other riders.
Criticised by some for being a one-race specialist, he has expressed an interest in broadening his horizons in 2005.
"It's fair to say there's still a lot of things I'd like to do in cycling, like the Classics and the hour record," Armstrong said during this year's Tour de France.
The Texan has made a contractual undertaking to ride in next year's Tour as part of his team's new sponsorship deal with the Discovery Channel.
But that only obliges him to take part, as opposed to structuring his entire season to chase a seventh win.