The fight against Russian Alexander Ustinov is probably David Tua's last shot at the big time and he has been training like it - revealing today that he has reached new levels of "darkness and emptiness'' during his gruelling preparations.
"There's darkness and emptiness that I've never experienced in my whole career and I'm quite humbled that I've experienced it this time,'' Tua said.
The 40-year-old has been under the direction of Lee Parore, the trainer who got him into career-best shape for his demolition of Shane Cameron in 2009.
His conditioning dropped away once he parted ways with Parore - his wins over Friday Ahunanya and Demetrice King counterbalanced by a draw and a loss to Monte Barrett - but now the link has been renewed Tua said he was in better shape than before the Cameron fight. Tua's last fight was the loss to American Barrett in August 2011.
"This is probably the hardest I've ever trained in my whole career. It's been a very tough road back. I've never experienced any pain like I've experienced on this camp.I've been in decent shape for a couple of fights, like the Shane Cameron fight, but I've never been in fighting shape.