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Neymar has fuelled further speculation he could be set to join Paris Saint-Germain after he "stormed out" of training with Barcelona following a heated row with team-mate Nelson Semedo, which required the pair to be separated. Per MailOnline's  Matthew Smith and Pete Jenson , the Brazilian reacted to a heavy challenge from Semedo and confronted the right-back before Javier Mascherano came between them. Sergio Busquets is said to have "restrained" him after Semedo returned to the training match. Neymar then appeared to throw his training bib away before leaving the field, kicking balls away as he went. MailOnline also provided footage of the incident: Training continued without the 25-year-old as he exited to the car park and left "the training area entirely." Barcelona will play  Real Madrid  on Saturday in the last pre-season friendly of their USA tour before returning to Spain on Sunday. According to Smith and Jenson, Neymar was due to fly ins