The boxers had been due to clash in the undisputed bout this month but it has been pushed back by three months after Fury was cut in sparring last week, although the Ukrainian has no ill-feeling towards his opponent.
Usyk said: "Why? Because it's the man who has my fourth belt. It's the man who helped me become famous a lot. Because we, all people, must love friends, [people who are] not friends, acquaintances, all people. It's great when you are polite, not dirty."
Usyk explained that his training camp had been going well before the delay and has vowed to be in shape to "box three Tyson Furys".
The world champion said: "I just looked back at all the work I've done - getting up early, jogging, swimming, sparring, the amount of it all, and I thought to myself: 'Wow, that's some good work I did.' Then I thought of how much more training I will do and how much good work I will do.
"So when, with God's help, I will finish all this work, I'll be able to box three Tyson Furys. We can do it simultaneously or one by one on Saturday, Sunday, and then Monday."
Some observers have suggested that Fury has faked the injury but Usyk is reserving judgement on the situation.
He said: "Is it serious or not? Does he want to box or not? He says he wants to become an undisputed [champion] but he doesn't take some of his training seriously enough. In general, I don't want to judge Tyson Fury, I'm just trying to say that it happens sometimes - what people plan, sometimes, doesn't correlate with our Lord's plans."