Five-time Tour de France champion Lance Armstrong says he could retire in 2005 if his team do not find a new sponsor.
US Postal is ending its association with Armstrong's team at the end of the year after being criticised for spending too much on sponsorship.
"If the team continues under another name with a new structure and a competitive squad, I'll be riding," Armstrong told L'Equipe newspaper.
"Otherwise I'll stop. US Postal were the perfect sponsors."
US Postal gave Armstrong a place on the team in 1997 after he had battled back from cancer, later promoting him to team leader.
The 32-year-old repaid their faith in him by winning the first of five straight Tour de France titles in 1999.
Now the American has already set his sights on a record-breaking sixth crown this year.
"Without them I might not have won one Tour," said Armstrong.
"It's April and the only thing that matters is who's going to win the Tour de France.
"I haven't really looked at 2005 because I don't know what I'll be doing then."