This incident will further fuel talks of a Neymar move to Paris Saint-Germain who are ready to smash the world record fee for him.
Neymar who is a subject of a world-record bid from Paris Saint-Germain was filmed walking out of training after the bust-up.
From the video, training seems to be going on as usual before Neymar and Semedo clashed in a challenge.
Things got heated from there as Javier Mascherano quickly stepped in to separate his teammates.
Semedo walked off but an angry Neymar was still coming after him before he was restrained by Sergio Busquets.
Neymar then pulls off his training bib which he threw to the floor and walked off. The 25-year-old is later seen furiously kicking a ball off the floor as he walks off angrily away from training.
The incident happened at a training session in Maimi where Barcelona are preparing for a pre-season friendly against Real Madrid.
It will further fuel the talks of a Neymar move to Paris Saint-Germain who are ready to splash a world-record fee on him.
Although Barcelona have publicly ruled out any move, senior officials of the club have reportedly grown frustrated at the conduct of the forward.
Neymar himself is open to a move to Paris Saint-Germain where he would be allowed to be the main star.
He has been in fantastic form for Barcelona in pre-season scoring three goals in two games- a brace against Juventus and a goal against Manchester United.
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It has also been reported that Neymar had planned not to join Barcelona’s flight back home after their pre-season tour of the United States and jet out to China for a promotional tour for Replay.
New reports have however revealed that the commercial engagement in China been cancelled.
This is however not the first Neymar is having a training ground bust-up.
He had clashed with then assistant manager Juan Carlos Unzue who had warned him to focus on football or he ends up having a short-lived career like former Barcelona star Ronaldinho