The Dutch midfielder has faced speculation over his future at Atalanta following a successful season with the Europa League winners. Koopmeiners was one of the key members of his side's famous win in Europe, as Ademola Lookman's hat-trick ended their 60-year wait for silverware, as well as Bayer Leverkusen's impervious, unbeaten run.
Reports have emerged from Italy this week that Liverpool are among the clubs looking to bring the 26-year-old to Anfield, as new Reds head coach Arne Slot worked with the Holland international during their time at AZ Alkmaar.
Full story: Liverpool Echo
