The newspaper said it had seen Tupetagi's Workers Compensation medical certificates, all of which cite discrimination as causing his distress.
In 2016 Tupetagi asked his boss to install a sunshade at the workplace to protect him from the sun.
His bosses ignored his request for three months but when Tupetagi then asked a second time for sunshade, his manager, "Byron", refused the request and told Tupetagi that his request was denied "because you're black", the statement of fact reads.
Following the repeated abuse, Tupetagi claims he needed "extensive" psychiatric support and has been diagnosed with severe depression.
Tupetagi claims he's been diagnosed with agoraphobia or fear of leaving safe places.
The case has reached the commission with Tupetagi alleging the treatment from his former employer exposed him to severe ridicule.
"By being presented with a sunscreen bottle, a product designed to save lives which the complainant had been denied access to previously, marked as a product designed to chase 'blacks' away, or even kill them, the complainant felt likened to an unwanted creature or pest," the statement of facts reads.
Tupetagi's lawyer told the court it was one of the most "shocking" cases of workplace racism and vilification he'd seen.
"Trying to make a black colleague extinct or otherwise treated like an insect is repugnant."
The case will go to court in a few weeks.