FINA appeals Cesar Cielo decision

LAUSANNE, Switzerland -- Swimming's governing body has appealed Cesar Cielo's doping case to the Court of Arbitration for Sport, although it is unclear if a verdict will come before this month's world championships.

The 2008 Olympic champion in the 50-meter freestyle and three Brazilian teammates tested positive for the banned substance furosemide in May at a meet in Rio de Janeiro.

Brazil's swim federation accepted the four swimmers' explanation that they consumed the drug in a contaminated batch of a supplement they regularly used.

FINA says in a statement that it "will use its best efforts to obtain a decision within the shortest possible time," although the governing body acknowledges that a fast-track trial would need to be approved by the athletes.