Liverpool manager Brendan Rodgers expects to make more additions to his squad before the end of the current transfer window.
Northern Irishman Rodgers, who has been in charge at Anfield since joining from Swansea in June 2012, has been active in the market so far this summer, bringing in Sunderland goalkeeper Simon Mignolet and Spanish forward Iago Aspas as well as defender Kolo Toure and Sevilla winger Luis Alberto.
But Rodgers, who is currently away with the squad on a pre-season tour of Norway, insists the club must continue to add quality players if they are to fulfil their ambition of mounting a serious charge for Champions League qualification this season.
"We're always looking to evolve the squad, to improve the group," he said at a press conference. "We still have some business to do to bring in a few more players.
"By the end of August I hope that we will have a squad that will be ready to compete and challenge for the top four."
One player being persistently linked with a switch to Merseyside is Atletico Madrid forward Diego Costa. 24-year-old Costa, who scored 20 goals for Los Rojiblancos last season, could be an eventual replacement for controversial striker Luis Suarez.
Uruguayan Suarez, whose glittering career has been plagued with controversy since he arrived in England from Ajax during the January 2011, is actively seeking to leave the club after becoming distressed with his negative portrayal throughout the British media.
On the future of Suarez, Rodgers said: "He's an incredible player, Luis Suarez. On the field he is a fighter, he wants to win and he showed that last season.
"We've obviously had a couple of bids from one club that has been nowhere near the valuation. I repeat - nowhere near the valuation of what he is worth in this market. There's no change to that.
"It's the same with any of our players - we're very much a team that's trying to build and go forward. For that, we want to keep our best players. We have no intention of selling one of the top players in the world to one of our rivals. The message is very clear: Luis Suarez is very much a Liverpool player."
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