By Jack Gallagher Atalanta director Luca Percassi has insisted that the club “does not need to sell” star midfielder Teun Koopmeiners amid Liverpool and Juventus interest. The Dutch international has been one of the standout performers in Italy for the best part of the last 18 months, bagging an impressive 22 goals and eight assists in all competitions during that period. Percassi has insisted in an interview with L’Eco di Bergamo that the midfielder hasn’t asked to be sold, despite Koopmeiners himself recently stating that was the case. “This club is solid and does not need to sell,” the Atal…