Celtic kicked off their tour of the United States in fine fashion on Saturday night, thrashing DC United 4-0 at Audi Field in Washington. Star player and captain for the evening Matt O’Riley set the example with a coolly taken double in the first half to have the Bhoys comfortable at the interval. Many substitutions followed as is typical of a pre-season friendly. Mikey Johnston slotted home from the bench after fine work from James Forrest before the winger himself combined with Hyunjun Yang to score a fourth. Celtic were dominant throughout and fully deserved their victory. In truth, the sco…