Both Chris Iwelumo and Jack Cork made substitute appearances tonight in the international games but David Edgar will have to wait a while longer to make his Canadian bow after missing out in their friendly in the Ukraine. Fourth cap for Chris IwelumoThe Scots were beaten 1-0 in their European qualifier against the Czech Republic in Prague with a goal from Romain Hubník on 70 minutes. Big Chris was introduced six minutes later, coming on as a replacement for QPR's Jamie Mackie.In the under-21 play off Jack Cork made an even later appearance for England in their 2-1 win against Romania at Norwich City's Carrow Road. Jordan Henderson (Sunderland) and Chris Smalling (Manchester United) got the goals with Cork coming on for Jack Wilshere in stoppage time.Former Claret Kyle Lafferty was also a substitute in Northern Ireland's impressive 0-0 draw against Italy at Windsor Park. He replaced David Healy.For David Edgar, however, the wait continues for a full international debut. He was called up for Canada's friendly against Ukraine in Kiev but didn't get on the pitch during the game which ended 2-2. They led 2-0 during the first half with Norwich's Simeon Jackson getting the first goal.The INTERNATIONALS section of the site has been updated following the appearances of Iwelumo and Lafferty.