Herbert is also still hoping to sign one more player before the end of the current transfer window after deciding against bringing in Indonesian forward Bambang Pamungkas.
"We've got until the end of August to sign somebody otherwise we'll have to wait until the January transfer window," he said.
"We probably could do with one more player. There's nobody at this stage who has put their foot in the door."
Interested to read that Ricki still hopes to sign another player:
Herbert is also still hoping to sign one more player before the end of the current transfer window after deciding against bringing in Indonesian forward Bambang Pamungkas.
"We've got until the end of August to sign somebody otherwise we'll have to wait until the January transfer window," he said.
"We probably could do with one more player. There's nobody at this stage who has put their foot in the door."