After suffering back to back defeats, Australian junior middleweight star Tim Tszyu admits that his career is on the line when he steps in the ring in April.

Last year, Tszyu suffered a twelve round split decision loss at the hands of Sebastian Fundora, and then he got battered and stopped by Bakhram Murtazaliev in October.

A deal has been finalized for Tszyu to take on once-beaten Joey Spencer in Newcastle on April 6.

If Tszyu suffers another defeat, to a contender like Spencer, than the future of his career will certainly be in jeopardy.

"This is the biggest fight of my career. This distinguishes where I come back and where my road will go," Tszyu said.

"Look, you're in this sport to test yourself at all times, so I wanted a tough challenge. When the fight got offered, it was a no-brainer for me. I knew I didn't want to take the long road to get back to the top. The shorter it is, the harder the opponents are.

"And I knew by taking Joe Spencer, this early, you're going to go straight back to where you belong. I've got redemption on my mind."

Tszyu's promoter George Rose from No Limit Boxing said his fighter wanted a solid comeback opponent with some skill.

"Look, a lot of people in their comeback fights, coming back from a loss would choose a dud opponent," Rose said.

"Tim is a guy who wants hard fights every time, and it kills me when he does it. I'd love to have an easy fight where we can just walk in and he wipes them out. "He probably still will do it anyway, but I'd love to have that thought going into it, not going into a fight where I know that he's fighting against a guy who's an absolute killer. This guy is a two time PBC prospect of the year, a guy who's only got one little blemish on his career, and a guy who absolutely wants to light up this division and sees this as a huge opportunity for himself."