He's not here for the scenery either.
"We both have the same goals, to become champions.
"For me the fight is not as crucial as it is for David, if I lose I will have another opportunity.
"David is very powerful ... we are studying his technique and training to combat his style."
Even though 40-year-old Tua hasn't fought for two years since his shock loss to Monte "Two Gunz" Barrett in August 2011, Ustinov said he had a lot of respect for Tua's power and left hook.
"I can only rely on myself and I have been training very hard for this fight - I'm ready for him - but I don't expect an easy fight.
"If I do win I will go over and say sorry to him for ending his career, but life does not end there."
He said Tua was a boxing legend, just as famous in Europe as he is in the rest of the boxing world.
"I feel privileged to fight against him, but it's my job, I have to punch people."
Ustinov won his last fight against journeyman Croatian fighter Ivica Perkovic in a unanimous decision over eight rounds. His one and only loss came in September last year when Bulgarian Kubrat Pulev knocked him out in the 11th round.
Ustinov also took time out to get in the ring with some of the young fighters at Rotovegas Boxing Gym, one of those lucky youngsters being four-time national champion David Faatape.
Faatape said the visit was inspirational, but he would be supporting Tua on the night.
"I felt really hyped in the ring with him.
"It was inspirational to me, both of us want to be champions. Boxing has kept me out of trouble for three years, but you have to stay 100 per cent focussed," Faatape said.
Ustinov said he enjoyed being able to visit and talk with local fighters.
"It means a lot to me. To see the happy faces on these kids feeds my soul."
Alexander "The Great" Ustinov
36 years old
2.07m (6ft 8in) tall
136kg
29 fights, 28 wins, 21 by knockout. 1 loss
Ranked 7 by the IBF and 10 by the WBA
