Unvaccinated tennis star Novak Djokovic is considering serving Australia’s government with a lawsuit after he was deported in the interest of public health ahead of the Australian Open.

Djokovic, 34, was consulting his legal team about suing the country for $4.4 million, a fee that includes the $2.75 million prize that the world’s top tennis player was expected to win, according to The Sun.

State and tennis officials had granted Djokovic a medical exemption to Australia’s strict COVID-19 vaccination policy because he had recently been infected with the virus, but immigration officials canceled the exemption and revoked his visa when he arrived in Melbourne on Jan.