In more positive news, Taulupe Faletau and Leigh Halfpenny are both nearing a return to fitness after calf problems and are expected to feature before the autumn international break.

Their availability would provide a welcome boost as Cardiff look to manage a challenging early-season injury list.

“Similar to last week, they’re getting more training time and getting into the system more, so all positive,” said van Zyl.

“Hopefully within the next two weeks [they will be able to play], so before the end of the block — but we’ll have to make sure they’re comfortable physically.”

Halfpenny has already been contributing off the field having rejoined Cardiff on a short-term deal last month.

“You can see already he’s made a big impact,” added van Zyl. “It’s small conversations sometimes that a player needs to build his confidence. Leigh’s been really good.”

Faletau, meanwhile, could come into contention for Wales selection before returning to action for his club.

“From the club’s perspective, it’s always the first prize for the boys to get higher honours,” van Zyl said.

“It’s not ideal, but ultimately as a player, you want to play well to get selected for your country. You can’t hold him back from doing that. I’d back him every day.”