A federal court in Sao Paulo has blocked Barcelona striker Neymar from using almost $50 million worth of assets — including a yacht, a jet and properties, officials told Reuters on Tuesday.The move was taken as the 24-year-old Brazilian is accused of tax evasion between 2011 and 2013.The court froze 188.8 million reais ($46.7 million) in assets last September but Neymar had been free to use those assets until now. Officials also corrected the amount to 192 million reais ($47.5 million).