Liverpool manager Roy Hodgson believes new signings must be made ahead of the start of their Europa League campaign later this month.
Hodgson has suggested that none of the players involved in World Cup duty in South Africa will be called upon to play in the third qualifying round tie which begins on July 29.
Macedonian side Rabotnicki or Armenia's Mika must be overcome if the Reds are to make the group stages.
However, with the likes of Spain duo Fernando Torres and Jose Reina, Argentina pair Javier Mascherano and Maxi Rodriguez, Denmark's Daniel Agger, Slovakia's Martin Skrtel and Dirk Kuyt and Ryan Babel of the Netherlands joining England trio Steven Gerrard, Jamie Carragher and Glen Johnson on the sidelines, Hodgson is desperate to bolster his squad.
Free agent England midfielder Joe Cole has emerged as a serious transfer target in recent days and Hodgson is looking to tie up some swift deals.
"Possibly none of our World Cup players will play in the early Europa Cup games if we listen to the advice of the sports science people," he told the club's official website.
"They are telling me we would be very foolhardy to use players who have only been training for three or four days on the back of the World Cup that early on because that will affect us further on down the road.
"If we feel we are endangering our chances of doing well in the Premier League by risking players in the early stage of the Europa League, it will be a decision the club will have to take. You have to follow the guidance.
"Their advice is to not use these players. If we have enough players to put a team out without them is another question.
"Things can happen before the 29th of July, we will not be speculating on that and there is no point in me making predictions of what the team will be like for that game.
"The sports science people are advising me not to use the players from the World Cup.
"Therefore new signings would become important for the Europa Cup."