He told the Scottish Sun: "I have watched Artur Boruc in some recent games and he looks to be getting back to his best form.
"If we take the Old Firm game, I thought he did very well indeed. He made a lot of saves that day.
"I think that in itself will have helped Boruc's form this season.
"Zaluska's mobility and decision-making at Rugby Park were very good indeed.
"That will help Artur to keep his edge.
"Possibly that was a problem in the past. That makes it hard if there is not someone pushing you for the shirt.
"In that situation, a keeper's work-rate can suffer. Zaluska is a good keeper and he will keep Boruc on his toes."