Nottingham Forest manager Steve McClaren says he needs new players in before their pre-season trip to Portugal next Wednesday.
Nine players have so far left the City Ground with only Andy Reid coming in.
McClaren told BBC Radio Nottingham: "It would be great to see some new faces because at the moment we don't have a squad big enough to work with.
"We've just got to keep going and realise the urgency of the situation that we need players."
Forest have made an approach to sign Newcastle winger Wayne Routledge and are being linked with a number of other players, including Bristol City striker Nicky Maynard.
But McClaren says he understands why many supporters are getting concerned at the lack of transfer activity.
"It's very difficult to think of anything but assembling a squad and we have eight players to bring in," he added.
"I join their concerns and I think the big headline is that we need players.
"We are eight players short but it's important that we get the right quality and when you're doing that it is difficult to negotiate with clubs and with agents.
"There's a lot going on behind the scenes, everyone's ferreting around and working so hard."
Forest will play one game while in the Algarve against a Tottenham Hotspur XI.