"I was never going to be sure how long it would take until I had a few days with him but he has improved a lot," said Purdon.
"I was able to get him back jogging today and I am now far more confident he will get to the Hunter Cup and then Menangle for the prelude and hopefully the Miracle Mile.
"So I'd expect to be in both of those."
That will see Lazarus firmly at the head of markets for both races once they re-open, with almost bookmakers suspending markets on the two great races when news of his problems broke.
He will however miss Friday night's West Australian Cup as will stablemate Ultimate Machete.
The four-year-old was also foot sore after finishing fourth in the Fremantle Cup and Purdon says he will now be set for the Chariots Of Fire in Sydney on February 10.
In their absence former Miracle Mile winner Have Faith In Me (barrier four) will be the New Zealand rep in the West Australian Cup.