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This paper investigates the effect of supporters on the performance of soccer players by skin color using objective player performance data and an automated skin color recognition algorithm. Identification comes from an exceptional change in access to stadiums: due to the COVID-19 restrictions, one third of the games of the highest Italian soccer league 2019/2020 season were played in closed stadiums. I identify a significant increase in the performance of non-white players, relative to white players, when supporters are banned from the stadium. The effect does not differ between home and away games, and players playing in top versus minor teams, while weaker players are impacted more than others. These results suggest that discrimination faced by non-white individuals affects performance.