Real Madrid's 1-0 defeat to Valencia in LaLiga was stopped for ten minutes after the player received racist abuse from home fans.
Valencia fans had to be warned during the game would be suspended if they continued to direct abuse towards the players.
Vinicius JR was then sent off in stoppage-time for hitting Valencia's Hugo Duro in the face.
It is not the first time he has been subject to racist abuse from away supporters with the player also being racially abused at Atletico Madrid and Real Mallorca.
The 22-year-old has since engaged in a war of words with LaLiga after his latest hardship.
READ MORE FOOTBALL
Anthony Joshua says 'I feel his pain' as he reacts to Vinicius Jr suffering racist abuse
Real Madrid launch criminal proceedings after Vinicius Jr suffers racist abuse
Numerous footballers have come out in support of Vinicius Jr, including Musah, who came on towards the end of the encounter.
"My support to @vinijr and all the people who have been and are going through this in their lives. IF YOUR [sic] RACIST TO HIM YOU ARE RACIST TO ME!" Musah said on social media.
The former Arsenal youngster also quoted a passage from the Qu'ran, which reads: "And of his signs is the creation of the heavens and earth, and the diversity of your languages and colours. There truly are signs in this for those who know."