But City, with three wins and a draw in four games, have coped well. Their younger players like Connor Metcalfe, Denis Genreau, Moudi Najaar and Ramy Najjarine have all stepped up for senior selection.
Key striker Jamie Maclaren is still a few weeks away from fitness as is defender Richard Windbichler, although Frenchman Florin Berenguer could be a chance of making the bench next week.
Mombaerts can, however, welcome back Uruguayan striker Javier Cabrera from injury and he will probably be on the bench for Friday’s game.
And teenager Stefan Colakovski could also figure after impressing off the bench in the Wellington victory.
“Javier is coming back in the squad. He is not fit enough to start. Maybe to play a few minutes,” said Mombaerts.
“Now with Harrison back we have more options in the middle and we have a few options with the positioning of Josh. He can be a defensive midfielder or he can play as [an attacking] midfielder, as he did against Western United.”
Najjar is another young player looking to get another start, and if Mombaerts opts to play with a taller forward he could get the nod.
But, he said, Colakovski could also play through the centre and offer a different kind of threat.
“With the NPL team he played a lot of goals as a striker. He has different qualities, he is very quick. Moudi is more a combine player.”