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Florian Wirtz broke the British transfer record while Jeremie Frimpong and Milos Kerkez didn't go cheap either.
But Liverpool are showing no signs of cutting back, with two Premier League stars on their radar.
Newcastle insist that Isak, 25, isn't for sale but it could be the beginning of a saga if Liverpool dangle the carrot.
At the back, Marc Guehi is a target.
Mirror Football recently reported that the Premier League champions are closing in on the England international, whose contract with Crystal Palace expires next summer.
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Guehi wouldn't come cheap, with the 25-year-old due to lead Palace into Europe after captaining them to a memorable FA Cup win.
And through the middle, there's no doubt that Isak would lead the line.
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This is how Liverpool could line up next season
Negotiations for those yet-to-be-completed deals would, of course, take time and the Reds have less than a month until they open their Premier League campaign at home to Bournemouth on Friday, August 15.
make the trip to Newcastle, where they may well have to defend against Isak if they can't complete a record-breaking transfer deal before then.
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Liverpool's potential starting XI: Alisson; Frimpong, Guehi, Van Dijk, Kerkez; Mac Allister, Gravenberch; Salah, Wirtz, Gakpo; Isak
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