King Magnus, who had spent a year off the scene to give his ageing body a chance to rest, had the benefit of Thomas Stockdale's 1.5kg when successful at his past two starts.
That claim will not be available on Saturday, but de Kock does not believe it will hinder the gelding's chances.
“I don't think he needed the claim the way he won his last two starts,” de Kock said.
“He won so convincingly, so we'll see what he can do on Saturday.” - Mathew de Kock
While King Magnus will do his bit for the stable at Flemington on Saturday, de Kock will be watching from afar as he is returning to South Africa for a holiday and will take in the Durban July at Greyville.
De Kock's father, Mike De Kock, is chasing a sixth win in the Grade 1 race and will have two representatives – Safe Passage and Dave The King.
“The Durban July, it's the equivalent of the Melbourne Cup in regard to the popularity of the race,” de Kock said.
“The old man has got two runners, so I'll go over and watch that.”