Yahoo Sports reports: Celtic defenders Alistair Johnston and Liam Scales missed out on a direct international match-up after each played a half in Canada's 1-1 friendly draw with Republic of Ireland. Johnston, 27, started for Canada at Montreal's Stade Saputo - winning his 58th cap - and was replaced at half-time by Niko Sigur. Scales, 27, replaced Corrie Ndaba at the break for Republic of Ireland for a 15th international appearance.