Australia-born Sam Johnson to make Scotland debut against Italy

• Glasgow centre to partner Huw Jones in Six Nations opener• Uncapped flanker Gary Graham and hooker Jake Kerr on benchGregor Townsend will hand a Test debut to the 25-year-old Glasgow centre Sam Johnson at home against Italy on Saturday.Gary Graham, the Newcastle flanker previously called up by England, and the Leicester hooker Jake Kerr could also win their first caps off the bench. The Edinburgh full-back Blair Kinghorn will start on the left wing. Related: Manu Tuilagi starts against Ireland as England keep faith with Elliot Daly Scotland Stuart Hogg (Glasgow), Tommy Seymour (Glasgow), Huw…