Alistair Johnston had a very successful season at Celtic and is now enjoying a productive summer with his national team, too. The right-back was a pivotal part of Canada’s performance at the Copa America over the weekend, helping secure a 0-0 result against Chile that sent them through to the quarter-finals of the tournament. Johnston is a proud Canadian and often speaks passionately about the national team. He puts every bit of effort possible into his international performances. It doesn’t go unnoticed. He’s a popular member of the squad amongst his teammates and supporters. His combative st…