The Brazil international who has been linked with a £196million move to Paris Saint-Germain, had to to be physically restrained before he walked away, kicking objects in his sight.
The video of the scuffle, which was aired on Sky Sports, shows that the fiery flashpoint occurs just after Neymar scores.
While running back, Semedo’s arm goes around Neymar’s neck and the pair jump all over each other before squaring up face-to-face.
Full-back Semedo, who joined Barca from Benfica for £26.8million just last month, then walks away as the rest of the Barcelona players look on.
سيميدو بدا الضرب pic.twitter.com/JP4eX3ROGU— ابو جورج - ראופיx ☀️ (@i_NJR_YT) July 28, 2017