"The first operation wasn't successful so two weeks ago we had round two," Worthington said.
The trainer has a positive outlook and says he's determined to "get on with it".
Whitefriars has been taken along slowly and is closing in on his first start for almost two years.
He has not raced since winning the group two Australia Stakes in January, 2011.
Whitefriars contracted pneumonia after that win and since then has also had two separate throat operations.
Worthington said Whitefriars would be an acceptor for the listed Razor Sharp (1200m) but a final decision on whether he runs or is saved for the Carrington (1100m) won't be made until later in the week.
"I don't want to lose the plot in the last week by making a rash decision and then the horse paying the price because of it," the trainer said.
"It's been a very long process getting him back. But as far as the horse is concerned, I'm very happy with him."
- AAP