Steven Naismith believes it is important Scotland continue their winning ways when they take on the United States in a friendly on Friday. Scotland have the chance to record three consecutive wins for the first time in six years when they host the Americans at Hampden Park. The fortunes of the national side have dramatically improved since Gordon Strachan was appointed manager, and they finished their unsuccessful World Cup qualifying campaign with wins over Macedonia and Croatia. But Naismith believes getting positive results in the two friendly matches is vital to keep the feel-good factor surrounding Scotland continuing into their next qualification campaign as they bid to make the finals of a major tournament for the first time since 1998.