Adrian Mutu won the latest stage of his long court battle with former club Chelsea, which he owes more than €17 million ($25 million) after being fired for using cocaine.
The Swiss Federal Court said Wednesday that the Romanian forward should not pay anything until it rules on his appeal against the Court of Arbitration for Sport, which said he must pay Chelsea compensation.
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The verdict is expected later this year.
Mutu took his case to the federal court as his final appeal route because CAS is based in Switzerland. CAS ruled in July that FIFA was right to award Chelsea compensation because Mutu breached his contract in 2004.
Chelsea fired Mutu for failing a drug test, then got nothing when he served a seven-month ban and rebuilt his career in Italy. Mutu joined Juventus as a free agent then was sold after one season for €8 million to Serie A rival Fiorentina.
The 30-year-old forward has enjoyed the most successful period of his career at the Florence club.
Mutu scored twice in a Champions League game Tuesday as Fiorentina won 4-3 at Hungarian champion Debrecen.