Leicester Tigers director of rugby Richard Cockerill has admitted his side are a "bit behind defensively" as new coach Phil Blake puts his systems in place.
The 50-year-old Aussie arrived in Leicester a couple of weeks ago after finishing his commitments Down Under with club side Manly.
Their qualification for the end-of-season play-offs in Australia delayed his arrival at Oval Park.
As a result, Cockerill said Tigers are still learning the way that Blake wants things done and are naturally getting used to that with the season already under way.
Tigers head to Exeter on Saturday after conceding two tries in the win against Newcastle last weekend.
Although Tigers had the firepower to battle back from that to record a comfortable bonus-win over the Falcons, bigger tests await at Exeter and Bath in the next two rounds.
"Our defence was a bit disorganised at times against Newcastle and we need to improve on that," said Cockerill.
"Phil Blake is working hard on that. I would have liked him here two months ago and we are behind a bit defensively.
"He is putting the foundations in that should have been done in July. But that is the circumstance we find ourselves in.
"With most good people, you have to wait for them and we have had to wait for Phil."
Tigers are also having to wait for the return of several of their big-name stars who are beginning the new season on the sidelines with injury.
Ant Allen did not feature last weekend while Tom Croft was a late withdrawl after being named in the side on Friday.
Cockerill said that it was not worth taking the risk with either man at the start of a long campaign.
"Tom Croft has a shoulder problem," he said. "He could have played but Jamie Gibson was one of our stand-out players last season and has been really good.
"We want to look after Crofty in a long season. There is no point pushing him when Jamie can step in.
"Ant is still recovering from his knee operation in the summer.
"He is training well and recovering. He was just not quite ready to play yet and it was sensible not to use him."
Tigers were also without Ed Slater, Louis Deacon, Miles Benjamin, Gonzalo Camacho, Dan Cole, Scott Hamilton, Pablo Matera, Geoff Parling, Laurence Pearce, Michele Rizzo, Adam Thompstone and Brad Thorn against Newcastle.
Marcos Ayerza is also away on international duty with Argentina.