Dwain Chambers has hinted he might quit athletics after winning a silver medal in the World Indoor Championships.
He set a new personal best in the 60 metres final by finishing in 6.54secs, behind Nigeria's Olusoji Fasuba.
It's the first time Chambers has run for Great Britain after a two-year ban from the sport for taking drugs.
But as the British Olympic Association still say he can't take part in the Beijing Olympics, Chambers said: "There may not be a return after this."
Jeanette Kwakye and Kelly Sotherton also won silver medals for Great Britain
The 29-year-old said he might appeal the decision, but if he couldn't carry on in athletics he would follow another career.
"I want to check my situation, check if it's worth appealing and if there's a chance of me winning then it's something we will consider," he said.
"But for now I just want to celebrate with my team-mates and go and have some fun. I can't please everybody, but I got a medal for my country and I'm happy."
Elsewhere, there were also silver medals for Kelly Sotherton in the Pentathlon, and Jeanette Kwakye in the 60 metres.