Aussie boxer Tim Tszyu has vowed to end the career of American fight legend Errol Spence Jr with a big win on Sunday.

Spence, 36, was once one of the best fighters in the world but hasn’t stepped inside a ring since a comprehensive loss to Terence Crawford three years ago, which is the only blemish on his 29-fight record.

Tszyu, 31, has been working to restore his image in the super welterweight division after three losses in the US in the space of 15 months.

A win over Spence would go a long way to regaining some attention in America, as top boxing promoter Lou DiBella explained to nine.com.au this week and the son of Aussie boxing royalty says he plans to make this Spence’s last fight.

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Tim Tszyu faces off with Errol Spence Jr. No Limit Boxing