Liverpool managing director Christian Purslow says they could sell again this month.
Andrea Dossena (Napoli) and Andriy Voronin (Dynamo Moscow) have both been moved on so far this winter market.
Purslow told the Liverpool Echo: "The position is January in general is not a high priority time for Rafa in terms of player acquisitions. That is largely because of the lack of availability of top- quality players.
"We have taken the opportunity in the window to move out a couple of players [Dossena and Voronin] who were not playing frequently and we are looking at one or two replacement players.
"The key point is we will not sell a footballer if we cannot find a better or equal replacement.
"At the same time, we are totally focused on results and wanting to have a successful second half of the season, and we would not want to leave our squad short compared with where we are today.
"So I do not rule out the possibility that we do sell another player - but only if the manger is happy he has found a comparable player or better. And if not, we will not sell any of our players - because we do not want to be short."