SHANGHAI — Olympic champion Cesar Cielo is expected to find out by Friday whether he will be banned from swimming, after the Court of Arbitration for Sport held a special six-hour hearing Wednesday into the Brazilian's doping case.

The CAS panel was specially assembled to deliver a verdict in the case before Cielo is scheduled to compete in the freestyle relay Sunday at the swimming world championships.

Cielo is also hoping to defend his world titles in the 50 and 100 free, plus he is entered in the 50 butterfly.

Swimming's governing body FINA challenged a Brazilian federation decision to give Cielo only a warning after he tested positive for furosemide, a banned diuretic and masking agent, at a meet in Rio de Janeiro in May.

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Cielo said he consumed the drug in a contaminated batch of a food supplement. He could face a ban of two years under WADA rules.

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