As the January window begins to heat up, one reported Liverpool target looks set to be on the move. The Reds have been linked with adding players to their squad in a number of positions this month. Owing to the injuries to Andy Robertson and Kostas Tsimikas, a new left-back could reportedly be on the agenda. With that in mind, one of the players mentioned has been Boca Juniors left-back Valentin Barco. As an exciting prospect at Boca, Liverpool midfielder Alexis Mac Allister has already given his stamp of approval to Barco. And according to journalist Fabrizio Romano, the 19-year-old could wel…