Nascimento and Lebusa both missed the 3-2 league defeat to Cape Town City on Monday due to injuries as youngster Nicholus Lukhubeni started at right-back.
Sundowns are going into the match against United still nursing their wounds but coach Pitso Mosimane is hoping the return of some of his defenders can make a difference at the back.
"Unlike having two days break before the match, now we have three days. A day is a bonus because you get those niggling injuries back," said Mosimane ahead of the next battle at Lucas Moripe Stadium on Friday (18h00).
"We hope to get Mosa Lebusa back. We will see him at training. We hope to get Nascimento back. We will see him at training.
"We say it's a month maybe but Anele Ngcongca is getting closer to feeling good and probably Anele can join the group [soon].
"You would like to have all your players back and you could see Aubrey Ngoma was running. We are getting a few players back in time."