Liverpool players are enjoying their time out in the United States as part of this year’s Copa America. While the European Championship has been a bit of a struggle for several Liverpool stars, things have been different in the US. Alexis Mac Allister and Argentina were perfect in the group stages, while Luis Diaz’s Colombia are guaranteed to progress after winning two from two. Brazil have been a little shaky with Alisson Becker between the sticks, but the Selecao are still more than likely to progress to the quarter-finals, too. And then there’s Darwin Nunez. The Liverpool No.9 has arguably …