SO hoping to retire undefeated is the same as saying he's going to retire after this fight? reading comprehension isn't real high on your skillset is it?
Errr. no please read the sentence properly. In fact let me help you.
"I hope to continue my win streak [BY DEFEATING BONER]
and I can finish my career
undefeated in the UFC," Silva said. "
There is a conjunction ('and') obviously anyone who can read english can tell the 1st part is NOT EQUAL in implication to the 2nd part.
It's really quite simple when you break the sentence up and read it slowly.